diff --git a/.gitignore b/.gitignore
index d6d9ffd..14e3c30 100644
--- a/.gitignore
+++ b/.gitignore
@@ -71,3 +71,6 @@ src/*/_version.py
 
 # test stuff
 tests/*.c
+
+# cython annotations
+src/*/*.html
diff --git a/src/hunter/_actions.c b/src/hunter/_actions.c
index 4b888ad..a0004d2 100644
--- a/src/hunter/_actions.c
+++ b/src/hunter/_actions.c
@@ -825,7 +825,6 @@ struct __pyx_obj_6hunter_8_actions_CallPrinter;
 struct __pyx_obj_6hunter_8_actions_VarsPrinter;
 struct __pyx_obj_6hunter_8_actions___pyx_scope_struct____pyx_f_6hunter_8_actions_fast_CallPrinter_call;
 struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_1_genexpr;
-struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_2__iter_symbols;
 struct __pyx_opt_args_6hunter_8_actions_safe_repr;
 struct __pyx_opt_args_6hunter_8_actions_hasdict;
 
@@ -1036,23 +1035,6 @@ struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_1_genexpr {
 };
 
 
-/* "hunter/_actions.pyx":532
- * 
- *     @staticmethod
- *     def _iter_symbols(code):             # <<<<<<<<<<<<<<
- *         """
- *         Iterate all the variable names in the given expression.
- */
-struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_2__iter_symbols {
-  PyObject_HEAD
-  PyObject *__pyx_v_code;
-  PyObject *__pyx_v_node;
-  PyObject *__pyx_t_0;
-  Py_ssize_t __pyx_t_1;
-  PyObject *(*__pyx_t_2)(PyObject *);
-};
-
-
 
 /* "_event.pxd":11
  * 
@@ -1122,6 +1104,7 @@ static struct __pyx_vtabstruct_6hunter_8_actions_CallPrinter *__pyx_vtabptr_6hun
 
 struct __pyx_vtabstruct_6hunter_8_actions_VarsPrinter {
   struct __pyx_vtabstruct_6hunter_8_actions_ColorStreamAction __pyx_base;
+  PyObject *(*_get_symbols)(struct __pyx_obj_6hunter_8_actions_VarsPrinter *);
 };
 static struct __pyx_vtabstruct_6hunter_8_actions_VarsPrinter *__pyx_vtabptr_6hunter_8_actions_VarsPrinter;
 
@@ -1761,10 +1744,6 @@ static CYTHON_INLINE void __Pyx_CyFunction_SetAnnotationsDict(PyObject *m,
                                                               PyObject *dict);
 static int __pyx_CyFunction_init(void);
 
-/* GetNameInClass.proto */
-#define __Pyx_GetNameInClass(var, nmspace, name)  (var) = __Pyx__GetNameInClass(nmspace, name)
-static PyObject *__Pyx__GetNameInClass(PyObject *nmspace, PyObject *name);
-
 /* CLineInTraceback.proto */
 #ifdef CYTHON_CLINE_IN_TRACEBACK
 #define __Pyx_CLineForTraceback(tstate, c_line)  (((CYTHON_CLINE_IN_TRACEBACK)) ? c_line : 0)
@@ -1901,6 +1880,7 @@ static int __Pyx_ExportFunction(const char *name, void (*f)(void), const char *s
 static int __Pyx_InitStrings(__Pyx_StringTabEntry *t);
 
 static PyObject *__pyx_f_6hunter_8_actions_17ColorStreamAction__try_repr(struct __pyx_obj_6hunter_8_actions_ColorStreamAction *__pyx_v_self, PyObject *__pyx_v_obj); /* proto*/
+static PyObject *__pyx_f_6hunter_8_actions_11VarsPrinter__get_symbols(struct __pyx_obj_6hunter_8_actions_VarsPrinter *__pyx_v_code); /* proto*/
 
 /* Module declarations from 'cython' */
 
@@ -1939,7 +1919,6 @@ static PyTypeObject *__pyx_ptype_6hunter_8_actions_CallPrinter = 0;
 static PyTypeObject *__pyx_ptype_6hunter_8_actions_VarsPrinter = 0;
 static PyTypeObject *__pyx_ptype_6hunter_8_actions___pyx_scope_struct____pyx_f_6hunter_8_actions_fast_CallPrinter_call = 0;
 static PyTypeObject *__pyx_ptype_6hunter_8_actions___pyx_scope_struct_1_genexpr = 0;
-static PyTypeObject *__pyx_ptype_6hunter_8_actions___pyx_scope_struct_2__iter_symbols = 0;
 static PyObject *__pyx_v_6hunter_8_actions_ColorStreamAction_STREAM_CACHE = 0;
 static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_CodePrinter_call(struct __pyx_obj_6hunter_8_actions_CodePrinter *, struct __pyx_obj_6hunter_6_event_Event *); /*proto*/
 static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_CallPrinter_call(struct __pyx_obj_6hunter_8_actions_CallPrinter *, struct __pyx_obj_6hunter_6_event_Event *); /*proto*/
@@ -1959,7 +1938,6 @@ int __pyx_module_is_main_hunter___actions = 0;
 
 /* Implementation of 'hunter._actions' */
 static PyObject *__pyx_builtin_ImportError;
-static PyObject *__pyx_builtin_staticmethod;
 static PyObject *__pyx_builtin_BaseException;
 static PyObject *__pyx_builtin_object;
 static PyObject *__pyx_builtin_NotImplementedError;
@@ -2009,7 +1987,6 @@ static const char __pyx_k_java[] = "java";
 static const char __pyx_k_join[] = "join";
 static const char __pyx_k_main[] = "__main__";
 static const char __pyx_k_name[] = "__name__";
-static const char __pyx_k_node[] = "node";
 static const char __pyx_k_open[] = "open";
 static const char __pyx_k_repr[] = "__repr__";
 static const char __pyx_k_send[] = "send";
@@ -2118,9 +2095,7 @@ static const char __pyx_k_EVENT_COLORS[] = "EVENT_COLORS";
 static const char __pyx_k_FunctionType[] = "FunctionType";
 static const char __pyx_k_STRING_TYPES[] = "STRING_TYPES";
 static const char __pyx_k_force_colors[] = "force_colors";
-static const char __pyx_k_iter_symbols[] = "_iter_symbols";
 static const char __pyx_k_pyx_checksum[] = "__pyx_checksum";
-static const char __pyx_k_staticmethod[] = "staticmethod";
 static const char __pyx_k_stringsource[] = "stringsource";
 static const char __pyx_k_thread_align[] = "thread_align";
 static const char __pyx_k_BaseException[] = "BaseException";
@@ -2149,11 +2124,9 @@ static const char __pyx_k_pyx_unpickle_Action[] = "__pyx_unpickle_Action";
 static const char __pyx_k_init___locals_lambda[] = "__init__.<locals>.<lambda>";
 static const char __pyx_k_pyx_unpickle_Manhole[] = "__pyx_unpickle_Manhole";
 static const char __pyx_k_pyx_unpickle_Debugger[] = "__pyx_unpickle_Debugger";
-static const char __pyx_k_src_hunter__actions_pyx[] = "src/hunter/_actions.pyx";
 static const char __pyx_k_pyx_unpickle_CallPrinter[] = "__pyx_unpickle_CallPrinter";
 static const char __pyx_k_pyx_unpickle_CodePrinter[] = "__pyx_unpickle_CodePrinter";
 static const char __pyx_k_pyx_unpickle_VarsPrinter[] = "__pyx_unpickle_VarsPrinter";
-static const char __pyx_k_VarsPrinter__iter_symbols[] = "VarsPrinter._iter_symbols";
 static const char __pyx_k_vars_vars_name_0_vars_reset_1[] = "{vars}{vars-name}{0}{vars}={reset}{1}";
 static const char __pyx_k_0___class_____name___options_0[] = "{0.__class__.__name__}(options={0.options})";
 static const char __pyx_k_pyx_unpickle_ColorStreamAction[] = "__pyx_unpickle_ColorStreamAction";
@@ -2227,7 +2200,6 @@ static PyObject *__pyx_n_s_PickleError;
 static PyObject *__pyx_n_s_STRING_TYPES;
 static PyObject *__pyx_n_s_TypeError;
 static PyObject *__pyx_n_s_VarsPrinter;
-static PyObject *__pyx_n_s_VarsPrinter__iter_symbols;
 static PyObject *__pyx_kp_s_VarsPrinter_requires_at_least_on;
 static PyObject *__pyx_kp_s__15;
 static PyObject *__pyx_kp_s__16;
@@ -2294,7 +2266,6 @@ static PyObject *__pyx_kp_s_internal_failure_FAILED_REPR_in;
 static PyObject *__pyx_n_s_io;
 static PyObject *__pyx_n_s_isatty;
 static PyObject *__pyx_n_s_items;
-static PyObject *__pyx_n_s_iter_symbols;
 static PyObject *__pyx_n_s_java;
 static PyObject *__pyx_n_s_join;
 static PyObject *__pyx_n_s_klass;
@@ -2309,7 +2280,6 @@ static PyObject *__pyx_kp_s_n;
 static PyObject *__pyx_n_s_name;
 static PyObject *__pyx_n_s_name_2;
 static PyObject *__pyx_n_s_new;
-static PyObject *__pyx_n_s_node;
 static PyObject *__pyx_n_s_obj;
 static PyObject *__pyx_n_s_obj_type;
 static PyObject *__pyx_n_s_object;
@@ -2374,8 +2344,6 @@ static PyObject *__pyx_n_s_source;
 static PyObject *__pyx_kp_s_source_failure_NO_SOURCE_source;
 static PyObject *__pyx_kp_s_source_failure_NO_SOURCE_source_2;
 static PyObject *__pyx_n_s_splitlines;
-static PyObject *__pyx_kp_s_src_hunter__actions_pyx;
-static PyObject *__pyx_n_s_staticmethod;
 static PyObject *__pyx_n_s_stream;
 static PyObject *__pyx_n_s_strict;
 static PyObject *__pyx_kp_s_stringsource;
@@ -2472,13 +2440,12 @@ static PyObject *__pyx_pf_6hunter_8_actions_11CallPrinter_4__reduce_cython__(str
 static PyObject *__pyx_pf_6hunter_8_actions_11CallPrinter_6__setstate_cython__(struct __pyx_obj_6hunter_8_actions_CallPrinter *__pyx_v_self, PyObject *__pyx_v___pyx_state); /* proto */
 static PyObject *__pyx_pf_6hunter_8_actions_21fast_CallPrinter_call_genexpr(PyObject *__pyx_self); /* proto */
 static int __pyx_pf_6hunter_8_actions_11VarsPrinter___init__(struct __pyx_obj_6hunter_8_actions_VarsPrinter *__pyx_v_self, PyObject *__pyx_v_names, PyObject *__pyx_v_options); /* proto */
-static PyObject *__pyx_pf_6hunter_8_actions_11VarsPrinter_2_iter_symbols(PyObject *__pyx_v_code); /* proto */
-static PyObject *__pyx_pf_6hunter_8_actions_11VarsPrinter_5__call__(struct __pyx_obj_6hunter_8_actions_VarsPrinter *__pyx_v_self, PyObject *__pyx_v_event); /* proto */
+static PyObject *__pyx_pf_6hunter_8_actions_11VarsPrinter_2__call__(struct __pyx_obj_6hunter_8_actions_VarsPrinter *__pyx_v_self, PyObject *__pyx_v_event); /* proto */
 static PyObject *__pyx_pf_6hunter_8_actions_11VarsPrinter_5names___get__(struct __pyx_obj_6hunter_8_actions_VarsPrinter *__pyx_v_self); /* proto */
 static int __pyx_pf_6hunter_8_actions_11VarsPrinter_5names_2__set__(struct __pyx_obj_6hunter_8_actions_VarsPrinter *__pyx_v_self, PyObject *__pyx_v_value); /* proto */
 static int __pyx_pf_6hunter_8_actions_11VarsPrinter_5names_4__del__(struct __pyx_obj_6hunter_8_actions_VarsPrinter *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_6hunter_8_actions_11VarsPrinter_7__reduce_cython__(struct __pyx_obj_6hunter_8_actions_VarsPrinter *__pyx_v_self); /* proto */
-static PyObject *__pyx_pf_6hunter_8_actions_11VarsPrinter_9__setstate_cython__(struct __pyx_obj_6hunter_8_actions_VarsPrinter *__pyx_v_self, PyObject *__pyx_v___pyx_state); /* proto */
+static PyObject *__pyx_pf_6hunter_8_actions_11VarsPrinter_4__reduce_cython__(struct __pyx_obj_6hunter_8_actions_VarsPrinter *__pyx_v_self); /* proto */
+static PyObject *__pyx_pf_6hunter_8_actions_11VarsPrinter_6__setstate_cython__(struct __pyx_obj_6hunter_8_actions_VarsPrinter *__pyx_v_self, PyObject *__pyx_v___pyx_state); /* proto */
 static PyObject *__pyx_pf_6hunter_8_actions_4__pyx_unpickle_Action(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v___pyx_type, long __pyx_v___pyx_checksum, PyObject *__pyx_v___pyx_state); /* proto */
 static PyObject *__pyx_pf_6hunter_8_actions_7__pyx_unpickle_Debugger(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v___pyx_type, long __pyx_v___pyx_checksum, PyObject *__pyx_v___pyx_state); /* proto */
 static PyObject *__pyx_pf_6hunter_8_actions_9__pyx_unpickle_Manhole(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v___pyx_type, long __pyx_v___pyx_checksum, PyObject *__pyx_v___pyx_state); /* proto */
@@ -2495,7 +2462,6 @@ static PyObject *__pyx_tp_new_6hunter_8_actions_CallPrinter(PyTypeObject *t, PyO
 static PyObject *__pyx_tp_new_6hunter_8_actions_VarsPrinter(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
 static PyObject *__pyx_tp_new_6hunter_8_actions___pyx_scope_struct____pyx_f_6hunter_8_actions_fast_CallPrinter_call(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
 static PyObject *__pyx_tp_new_6hunter_8_actions___pyx_scope_struct_1_genexpr(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
-static PyObject *__pyx_tp_new_6hunter_8_actions___pyx_scope_struct_2__iter_symbols(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
 static __Pyx_CachedCFunction __pyx_umethod_PyList_Type_pop = {0, &__pyx_n_s_pop, 0, 0, 0};
 static __Pyx_CachedCFunction __pyx_umethod_PySet_Type_update = {0, &__pyx_n_s_update, 0, 0, 0};
 static __Pyx_CachedCFunction __pyx_umethod_PyString_Type_replace = {0, &__pyx_n_s_replace, 0, 0, 0};
@@ -2525,6 +2491,7 @@ static PyObject *__pyx_k__14;
 static PyObject *__pyx_tuple_;
 static PyObject *__pyx_slice__19;
 static PyObject *__pyx_tuple__22;
+static PyObject *__pyx_tuple__23;
 static PyObject *__pyx_tuple__24;
 static PyObject *__pyx_tuple__25;
 static PyObject *__pyx_tuple__26;
@@ -2533,22 +2500,19 @@ static PyObject *__pyx_tuple__28;
 static PyObject *__pyx_tuple__29;
 static PyObject *__pyx_tuple__30;
 static PyObject *__pyx_tuple__31;
-static PyObject *__pyx_tuple__32;
 static PyObject *__pyx_tuple__33;
 static PyObject *__pyx_tuple__35;
 static PyObject *__pyx_tuple__37;
 static PyObject *__pyx_tuple__39;
 static PyObject *__pyx_tuple__41;
 static PyObject *__pyx_tuple__43;
-static PyObject *__pyx_tuple__45;
-static PyObject *__pyx_codeobj__23;
+static PyObject *__pyx_codeobj__32;
 static PyObject *__pyx_codeobj__34;
 static PyObject *__pyx_codeobj__36;
 static PyObject *__pyx_codeobj__38;
 static PyObject *__pyx_codeobj__40;
 static PyObject *__pyx_codeobj__42;
 static PyObject *__pyx_codeobj__44;
-static PyObject *__pyx_codeobj__46;
 /* Late includes */
 
 /* "hunter/_actions.pyx":145
@@ -12845,7 +12809,7 @@ static PyObject *__pyx_pf_6hunter_8_actions_11CallPrinter_6__setstate_cython__(s
   __Pyx_RefNannyFinishContext();
   return __pyx_r;
 }
-static PyObject *__pyx_gb_6hunter_8_actions_21fast_CallPrinter_call_2generator1(__pyx_CoroutineObject *__pyx_generator, CYTHON_UNUSED PyThreadState *__pyx_tstate, PyObject *__pyx_sent_value); /* proto */
+static PyObject *__pyx_gb_6hunter_8_actions_21fast_CallPrinter_call_2generator(__pyx_CoroutineObject *__pyx_generator, CYTHON_UNUSED PyThreadState *__pyx_tstate, PyObject *__pyx_sent_value); /* proto */
 
 /* "hunter/_actions.pyx":447
  *                     '   ' * (len(stack) - 1),
@@ -12872,7 +12836,7 @@ static PyObject *__pyx_pf_6hunter_8_actions_21fast_CallPrinter_call_genexpr(PyOb
   __Pyx_INCREF(((PyObject *)__pyx_cur_scope->__pyx_outer_scope));
   __Pyx_GIVEREF(__pyx_cur_scope->__pyx_outer_scope);
   {
-    __pyx_CoroutineObject *gen = __Pyx_Generator_New((__pyx_coroutine_body_t) __pyx_gb_6hunter_8_actions_21fast_CallPrinter_call_2generator1, NULL, (PyObject *) __pyx_cur_scope, __pyx_n_s_genexpr, __pyx_n_s_fast_CallPrinter_call_locals_gen, __pyx_n_s_hunter__actions); if (unlikely(!gen)) __PYX_ERR(0, 447, __pyx_L1_error)
+    __pyx_CoroutineObject *gen = __Pyx_Generator_New((__pyx_coroutine_body_t) __pyx_gb_6hunter_8_actions_21fast_CallPrinter_call_2generator, NULL, (PyObject *) __pyx_cur_scope, __pyx_n_s_genexpr, __pyx_n_s_fast_CallPrinter_call_locals_gen, __pyx_n_s_hunter__actions); if (unlikely(!gen)) __PYX_ERR(0, 447, __pyx_L1_error)
     __Pyx_DECREF(__pyx_cur_scope);
     __Pyx_RefNannyFinishContext();
     return (PyObject *) gen;
@@ -12888,7 +12852,7 @@ static PyObject *__pyx_pf_6hunter_8_actions_21fast_CallPrinter_call_genexpr(PyOb
   return __pyx_r;
 }
 
-static PyObject *__pyx_gb_6hunter_8_actions_21fast_CallPrinter_call_2generator1(__pyx_CoroutineObject *__pyx_generator, CYTHON_UNUSED PyThreadState *__pyx_tstate, PyObject *__pyx_sent_value) /* generator body */
+static PyObject *__pyx_gb_6hunter_8_actions_21fast_CallPrinter_call_2generator(__pyx_CoroutineObject *__pyx_generator, CYTHON_UNUSED PyThreadState *__pyx_tstate, PyObject *__pyx_sent_value) /* generator body */
 {
   struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_1_genexpr *__pyx_cur_scope = ((struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_1_genexpr *)__pyx_generator->closure);
   PyObject *__pyx_r = NULL;
@@ -14506,8 +14470,6 @@ static int __pyx_pf_6hunter_8_actions_11VarsPrinter___init__(struct __pyx_obj_6h
   PyObject *__pyx_t_4 = NULL;
   Py_ssize_t __pyx_t_5;
   PyObject *__pyx_t_6 = NULL;
-  PyObject *__pyx_t_7 = NULL;
-  PyObject *__pyx_t_8 = NULL;
   __Pyx_RefNannySetupContext("__init__", 0);
 
   /* "hunter/_actions.pyx":523
@@ -14526,7 +14488,7 @@ static int __pyx_pf_6hunter_8_actions_11VarsPrinter___init__(struct __pyx_obj_6h
  *         if not names:
  *             raise TypeError('VarsPrinter requires at least one variable name/expression.')             # <<<<<<<<<<<<<<
  *         self.names = {
- *             name: set(self._iter_symbols(name))
+ *             name: VarsPrinter._get_symbols(name)
  */
     __pyx_t_3 = __Pyx_PyObject_Call(__pyx_builtin_TypeError, __pyx_tuple__22, NULL); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 524, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_3);
@@ -14547,7 +14509,7 @@ static int __pyx_pf_6hunter_8_actions_11VarsPrinter___init__(struct __pyx_obj_6h
  *         if not names:
  *             raise TypeError('VarsPrinter requires at least one variable name/expression.')
  *         self.names = {             # <<<<<<<<<<<<<<
- *             name: set(self._iter_symbols(name))
+ *             name: VarsPrinter._get_symbols(name)
  *             for name in names
  */
   { /* enter inner scope */
@@ -14556,7 +14518,7 @@ static int __pyx_pf_6hunter_8_actions_11VarsPrinter___init__(struct __pyx_obj_6h
 
     /* "hunter/_actions.pyx":527
  *         self.names = {
- *             name: set(self._iter_symbols(name))
+ *             name: VarsPrinter._get_symbols(name)
  *             for name in names             # <<<<<<<<<<<<<<
  *         }
  *         super(VarsPrinter, self).__init__(**options)
@@ -14576,36 +14538,19 @@ static int __pyx_pf_6hunter_8_actions_11VarsPrinter___init__(struct __pyx_obj_6h
       /* "hunter/_actions.pyx":526
  *             raise TypeError('VarsPrinter requires at least one variable name/expression.')
  *         self.names = {
- *             name: set(self._iter_symbols(name))             # <<<<<<<<<<<<<<
+ *             name: VarsPrinter._get_symbols(name)             # <<<<<<<<<<<<<<
  *             for name in names
  *         }
  */
-      __pyx_t_7 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_iter_symbols); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 526, __pyx_L6_error)
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-      if (CYTHON_UNPACK_METHODS && likely(PyMethod_Check(__pyx_t_7))) {
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-          __Pyx_INCREF(__pyx_t_8);
-          __Pyx_INCREF(function);
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-      __pyx_t_6 = (__pyx_t_8) ? __Pyx_PyObject_Call2Args(__pyx_t_7, __pyx_t_8, __pyx_8genexpr1__pyx_v_name) : __Pyx_PyObject_CallOneArg(__pyx_t_7, __pyx_8genexpr1__pyx_v_name);
-      __Pyx_XDECREF(__pyx_t_8); __pyx_t_8 = 0;
-      if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 526, __pyx_L6_error)
+      if (!(likely(((__pyx_8genexpr1__pyx_v_name) == Py_None) || likely(__Pyx_TypeTest(__pyx_8genexpr1__pyx_v_name, __pyx_ptype_6hunter_8_actions_VarsPrinter))))) __PYX_ERR(0, 526, __pyx_L6_error)
+      __pyx_t_6 = __pyx_f_6hunter_8_actions_11VarsPrinter__get_symbols(((struct __pyx_obj_6hunter_8_actions_VarsPrinter *)__pyx_8genexpr1__pyx_v_name)); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 526, __pyx_L6_error)
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-      __Pyx_DECREF(__pyx_t_7); __pyx_t_7 = 0;
-      __pyx_t_7 = PySet_New(__pyx_t_6); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 526, __pyx_L6_error)
-      __Pyx_GOTREF(__pyx_t_7);
+      if (unlikely(PyDict_SetItem(__pyx_t_3, (PyObject*)__pyx_8genexpr1__pyx_v_name, (PyObject*)__pyx_t_6))) __PYX_ERR(0, 526, __pyx_L6_error)
       __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
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-      __Pyx_DECREF(__pyx_t_7); __pyx_t_7 = 0;
 
       /* "hunter/_actions.pyx":527
  *         self.names = {
- *             name: set(self._iter_symbols(name))
+ *             name: VarsPrinter._get_symbols(name)
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-    __Pyx_GetModuleGlobalName(__pyx_t_3, __pyx_n_s_threading); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 564, __pyx_L1_error)
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@@ -16076,13 +15925,13 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
         PyTuple_SET_ITEM(__pyx_t_1, 2, __pyx_t_2);
         __pyx_t_3 = 0;
         __pyx_t_2 = 0;
-        __pyx_t_2 = __Pyx_PyObject_Call(__pyx_builtin_eval, __pyx_t_1, NULL); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 576, __pyx_L9_error)
+        __pyx_t_2 = __Pyx_PyObject_Call(__pyx_builtin_eval, __pyx_t_1, NULL); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 578, __pyx_L9_error)
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-        /* "hunter/_actions.pyx":575
+        /* "hunter/_actions.pyx":577
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  *         for code, symbols in self.names.items():
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@@ -16091,7 +15940,7 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
  */
       }
 
-      /* "hunter/_actions.pyx":582
+      /* "hunter/_actions.pyx":584
  *                 printout = '{internal-failure}FAILED EVAL: {internal-detail}{!r}'.format(exc, **self.event_colors)
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@@ -16099,7 +15948,7 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
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-        __pyx_t_2 = ((struct __pyx_vtabstruct_6hunter_8_actions_VarsPrinter *)__pyx_v_self->__pyx_base.__pyx_vtab)->__pyx_base._try_repr(((struct __pyx_obj_6hunter_8_actions_ColorStreamAction *)__pyx_v_self), __pyx_v_obj); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 582, __pyx_L11_except_error)
+        __pyx_t_2 = ((struct __pyx_vtabstruct_6hunter_8_actions_VarsPrinter *)__pyx_v_self->__pyx_base.__pyx_vtab)->__pyx_base._try_repr(((struct __pyx_obj_6hunter_8_actions_ColorStreamAction *)__pyx_v_self), __pyx_v_obj); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 584, __pyx_L11_except_error)
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@@ -16113,7 +15962,7 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
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-      /* "hunter/_actions.pyx":577
+      /* "hunter/_actions.pyx":579
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@@ -16123,12 +15972,12 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
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-        if (__Pyx_GetException(&__pyx_t_2, &__pyx_t_1, &__pyx_t_3) < 0) __PYX_ERR(0, 577, __pyx_L11_except_error)
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-        /* "hunter/_actions.pyx":578
+        /* "hunter/_actions.pyx":580
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@@ -16143,7 +15992,7 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
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-      /* "hunter/_actions.pyx":579
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@@ -16153,7 +16002,7 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
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       if (__pyx_t_11) {
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-        if (__Pyx_GetException(&__pyx_t_3, &__pyx_t_1, &__pyx_t_2) < 0) __PYX_ERR(0, 579, __pyx_L11_except_error)
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@@ -16161,25 +16010,25 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
         __pyx_v_exc = __pyx_t_1;
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-          /* "hunter/_actions.pyx":580
+          /* "hunter/_actions.pyx":582
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-          __pyx_t_16 = PyTuple_New(1); if (unlikely(!__pyx_t_16)) __PYX_ERR(0, 580, __pyx_L24_error)
+          __pyx_t_16 = PyTuple_New(1); if (unlikely(!__pyx_t_16)) __PYX_ERR(0, 582, __pyx_L24_error)
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             PyErr_SetString(PyExc_TypeError, "argument after ** must be a mapping, not NoneType");
-            __PYX_ERR(0, 580, __pyx_L24_error)
+            __PYX_ERR(0, 582, __pyx_L24_error)
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-          __pyx_t_17 = __Pyx_PyObject_Call(__pyx_t_15, __pyx_t_16, __pyx_v_self->__pyx_base.event_colors); if (unlikely(!__pyx_t_17)) __PYX_ERR(0, 580, __pyx_L24_error)
+          __pyx_t_17 = __Pyx_PyObject_Call(__pyx_t_15, __pyx_t_16, __pyx_v_self->__pyx_base.event_colors); if (unlikely(!__pyx_t_17)) __PYX_ERR(0, 582, __pyx_L24_error)
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@@ -16187,7 +16036,7 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
           __pyx_t_17 = 0;
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-        /* "hunter/_actions.pyx":579
+        /* "hunter/_actions.pyx":581
  *             except AttributeError:
  *                 continue
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@@ -16245,7 +16094,7 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
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       __pyx_L11_except_error:;
 
-      /* "hunter/_actions.pyx":575
+      /* "hunter/_actions.pyx":577
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  *         for code, symbols in self.names.items():
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@@ -16271,42 +16120,42 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
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-    /* "hunter/_actions.pyx":584
+    /* "hunter/_actions.pyx":586
  *                 printout = self._try_repr(obj)
  * 
  *             if frame_symbols >= symbols:             # <<<<<<<<<<<<<<
  *                 self.stream.write(
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  */
-    __pyx_t_2 = PyObject_RichCompare(__pyx_v_frame_symbols, __pyx_v_symbols, Py_GE); __Pyx_XGOTREF(__pyx_t_2); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 584, __pyx_L1_error)
-    __pyx_t_6 = __Pyx_PyObject_IsTrue(__pyx_t_2); if (unlikely(__pyx_t_6 < 0)) __PYX_ERR(0, 584, __pyx_L1_error)
+    __pyx_t_2 = PyObject_RichCompare(__pyx_v_frame_symbols, __pyx_v_symbols, Py_GE); __Pyx_XGOTREF(__pyx_t_2); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 586, __pyx_L1_error)
+    __pyx_t_6 = __Pyx_PyObject_IsTrue(__pyx_t_2); if (unlikely(__pyx_t_6 < 0)) __PYX_ERR(0, 586, __pyx_L1_error)
     __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
     if (__pyx_t_6) {
 
-      /* "hunter/_actions.pyx":585
+      /* "hunter/_actions.pyx":587
  * 
  *             if frame_symbols >= symbols:
  *                 self.stream.write(             # <<<<<<<<<<<<<<
  *                     '{pid:{pid_align}}{thread:{thread_align}}{:>{align}}       '
  *                     '{vars}{:9} {vars-name}{} {vars}=> {reset}{}{reset}\n'.format(
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-      __pyx_t_1 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_stream); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 585, __pyx_L1_error)
+      __pyx_t_1 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_stream); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 587, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_1);
-      __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_t_1, __pyx_n_s_write); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 585, __pyx_L1_error)
+      __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_t_1, __pyx_n_s_write); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 587, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_3);
       __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
 
-      /* "hunter/_actions.pyx":587
+      /* "hunter/_actions.pyx":589
  *                 self.stream.write(
  *                     '{pid:{pid_align}}{thread:{thread_align}}{:>{align}}       '
  *                     '{vars}{:9} {vars-name}{} {vars}=> {reset}{}{reset}\n'.format(             # <<<<<<<<<<<<<<
  *                         '',
  *                         'vars' if first else '...',
  */
-      __pyx_t_1 = __Pyx_PyObject_GetAttrStr(__pyx_kp_s_pid_pid_align_thread_thread_ali_8, __pyx_n_s_format); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 587, __pyx_L1_error)
+      __pyx_t_1 = __Pyx_PyObject_GetAttrStr(__pyx_kp_s_pid_pid_align_thread_thread_ali_8, __pyx_n_s_format); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 589, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_1);
 
-      /* "hunter/_actions.pyx":589
+      /* "hunter/_actions.pyx":591
  *                     '{vars}{:9} {vars-name}{} {vars}=> {reset}{}{reset}\n'.format(
  *                         '',
  *                         'vars' if first else '...',             # <<<<<<<<<<<<<<
@@ -16321,14 +16170,14 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
         __pyx_t_17 = __pyx_kp_s__2;
       }
 
-      /* "hunter/_actions.pyx":587
+      /* "hunter/_actions.pyx":589
  *                 self.stream.write(
  *                     '{pid:{pid_align}}{thread:{thread_align}}{:>{align}}       '
  *                     '{vars}{:9} {vars-name}{} {vars}=> {reset}{}{reset}\n'.format(             # <<<<<<<<<<<<<<
  *                         '',
  *                         'vars' if first else '...',
  */
-      __pyx_t_16 = PyTuple_New(4); if (unlikely(!__pyx_t_16)) __PYX_ERR(0, 587, __pyx_L1_error)
+      __pyx_t_16 = PyTuple_New(4); if (unlikely(!__pyx_t_16)) __PYX_ERR(0, 589, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_16);
       __Pyx_INCREF(__pyx_kp_s__5);
       __Pyx_GIVEREF(__pyx_kp_s__5);
@@ -16343,43 +16192,43 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
       PyTuple_SET_ITEM(__pyx_t_16, 3, __pyx_v_printout);
       __pyx_t_17 = 0;
 
-      /* "hunter/_actions.pyx":592
+      /* "hunter/_actions.pyx":594
  *                         code,
  *                         printout,
  *                         pid=pid, pid_align=pid_align,             # <<<<<<<<<<<<<<
  *                         thread=thread_name, thread_align=thread_align,
  *                         align=self.filename_alignment,
  */
-      __pyx_t_15 = __Pyx_PyDict_NewPresized(5); if (unlikely(!__pyx_t_15)) __PYX_ERR(0, 592, __pyx_L1_error)
+      __pyx_t_15 = __Pyx_PyDict_NewPresized(5); if (unlikely(!__pyx_t_15)) __PYX_ERR(0, 594, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_15);
-      if (PyDict_SetItem(__pyx_t_15, __pyx_n_s_pid, __pyx_v_pid) < 0) __PYX_ERR(0, 592, __pyx_L1_error)
-      if (PyDict_SetItem(__pyx_t_15, __pyx_n_s_pid_align, __pyx_v_pid_align) < 0) __PYX_ERR(0, 592, __pyx_L1_error)
+      if (PyDict_SetItem(__pyx_t_15, __pyx_n_s_pid, __pyx_v_pid) < 0) __PYX_ERR(0, 594, __pyx_L1_error)
+      if (PyDict_SetItem(__pyx_t_15, __pyx_n_s_pid_align, __pyx_v_pid_align) < 0) __PYX_ERR(0, 594, __pyx_L1_error)
 
-      /* "hunter/_actions.pyx":593
+      /* "hunter/_actions.pyx":595
  *                         printout,
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  *                         thread=thread_name, thread_align=thread_align,             # <<<<<<<<<<<<<<
  *                         align=self.filename_alignment,
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-      if (PyDict_SetItem(__pyx_t_15, __pyx_n_s_thread, __pyx_v_thread_name) < 0) __PYX_ERR(0, 592, __pyx_L1_error)
-      if (PyDict_SetItem(__pyx_t_15, __pyx_n_s_thread_align, __pyx_v_thread_align) < 0) __PYX_ERR(0, 592, __pyx_L1_error)
+      if (PyDict_SetItem(__pyx_t_15, __pyx_n_s_thread, __pyx_v_thread_name) < 0) __PYX_ERR(0, 594, __pyx_L1_error)
+      if (PyDict_SetItem(__pyx_t_15, __pyx_n_s_thread_align, __pyx_v_thread_align) < 0) __PYX_ERR(0, 594, __pyx_L1_error)
 
-      /* "hunter/_actions.pyx":594
+      /* "hunter/_actions.pyx":596
  *                         pid=pid, pid_align=pid_align,
  *                         thread=thread_name, thread_align=thread_align,
  *                         align=self.filename_alignment,             # <<<<<<<<<<<<<<
  *                         **self.event_colors
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-      __pyx_t_26 = __Pyx_PyInt_From_int(__pyx_v_self->__pyx_base.filename_alignment); if (unlikely(!__pyx_t_26)) __PYX_ERR(0, 594, __pyx_L1_error)
+      __pyx_t_26 = __Pyx_PyInt_From_int(__pyx_v_self->__pyx_base.filename_alignment); if (unlikely(!__pyx_t_26)) __PYX_ERR(0, 596, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_26);
-      if (PyDict_SetItem(__pyx_t_15, __pyx_n_s_align, __pyx_t_26) < 0) __PYX_ERR(0, 592, __pyx_L1_error)
+      if (PyDict_SetItem(__pyx_t_15, __pyx_n_s_align, __pyx_t_26) < 0) __PYX_ERR(0, 594, __pyx_L1_error)
       __Pyx_DECREF(__pyx_t_26); __pyx_t_26 = 0;
       __pyx_t_17 = __pyx_t_15;
       __pyx_t_15 = 0;
 
-      /* "hunter/_actions.pyx":595
+      /* "hunter/_actions.pyx":597
  *                         thread=thread_name, thread_align=thread_align,
  *                         align=self.filename_alignment,
  *                         **self.event_colors             # <<<<<<<<<<<<<<
@@ -16388,18 +16237,18 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
  */
       if (unlikely(__pyx_v_self->__pyx_base.event_colors == Py_None)) {
         PyErr_SetString(PyExc_TypeError, "argument after ** must be a mapping, not NoneType");
-        __PYX_ERR(0, 595, __pyx_L1_error)
+        __PYX_ERR(0, 597, __pyx_L1_error)
       }
-      if (__Pyx_MergeKeywords(__pyx_t_17, __pyx_v_self->__pyx_base.event_colors) < 0) __PYX_ERR(0, 595, __pyx_L1_error)
+      if (__Pyx_MergeKeywords(__pyx_t_17, __pyx_v_self->__pyx_base.event_colors) < 0) __PYX_ERR(0, 597, __pyx_L1_error)
 
-      /* "hunter/_actions.pyx":587
+      /* "hunter/_actions.pyx":589
  *                 self.stream.write(
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  *                     '{vars}{:9} {vars-name}{} {vars}=> {reset}{}{reset}\n'.format(             # <<<<<<<<<<<<<<
  *                         '',
  *                         'vars' if first else '...',
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-      __pyx_t_15 = __Pyx_PyObject_Call(__pyx_t_1, __pyx_t_16, __pyx_t_17); if (unlikely(!__pyx_t_15)) __PYX_ERR(0, 587, __pyx_L1_error)
+      __pyx_t_15 = __Pyx_PyObject_Call(__pyx_t_1, __pyx_t_16, __pyx_t_17); if (unlikely(!__pyx_t_15)) __PYX_ERR(0, 589, __pyx_L1_error)
       __Pyx_GOTREF(__pyx_t_15);
       __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
       __Pyx_DECREF(__pyx_t_16); __pyx_t_16 = 0;
@@ -16417,19 +16266,19 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
       __pyx_t_2 = (__pyx_t_17) ? __Pyx_PyObject_Call2Args(__pyx_t_3, __pyx_t_17, __pyx_t_15) : __Pyx_PyObject_CallOneArg(__pyx_t_3, __pyx_t_15);
       __Pyx_XDECREF(__pyx_t_17); __pyx_t_17 = 0;
       __Pyx_DECREF(__pyx_t_15); __pyx_t_15 = 0;
-      if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 585, __pyx_L1_error)
+      if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 587, __pyx_L1_error)
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-      /* "hunter/_actions.pyx":598
+      /* "hunter/_actions.pyx":600
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  *                 first = False             # <<<<<<<<<<<<<<
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       __pyx_v_first = 0;
 
-      /* "hunter/_actions.pyx":584
+      /* "hunter/_actions.pyx":586
  *                 printout = self._try_repr(obj)
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  *             if frame_symbols >= symbols:             # <<<<<<<<<<<<<<
@@ -16441,7 +16290,7 @@ static CYTHON_INLINE PyObject *__pyx_f_6hunter_8_actions_fast_VarsPrinter_call(s
   }
   __Pyx_DECREF(__pyx_t_8); __pyx_t_8 = 0;
 
-  /* "hunter/_actions.pyx":551
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 }
 
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-  {"__reduce_cython__", (PyCFunction)__pyx_pw_6hunter_8_actions_11VarsPrinter_8__reduce_cython__, METH_NOARGS, 0},
-  {"__setstate_cython__", (PyCFunction)__pyx_pw_6hunter_8_actions_11VarsPrinter_10__setstate_cython__, METH_O, 0},
+  {"__reduce_cython__", (PyCFunction)__pyx_pw_6hunter_8_actions_11VarsPrinter_5__reduce_cython__, METH_NOARGS, 0},
+  {"__setstate_cython__", (PyCFunction)__pyx_pw_6hunter_8_actions_11VarsPrinter_7__setstate_cython__, METH_O, 0},
   {0, 0, 0, 0}
 };
 
@@ -20762,7 +20610,7 @@ static PyTypeObject __pyx_type_6hunter_8_actions_VarsPrinter = {
   0, /*tp_as_sequence*/
   0, /*tp_as_mapping*/
   0, /*tp_hash*/
-  __pyx_pw_6hunter_8_actions_11VarsPrinter_6__call__, /*tp_call*/
+  __pyx_pw_6hunter_8_actions_11VarsPrinter_3__call__, /*tp_call*/
   #if CYTHON_COMPILING_IN_PYPY
   __pyx_pw_6hunter_8_actions_17ColorStreamAction_5__str__, /*tp_str*/
   #else
@@ -21025,109 +20873,6 @@ static PyTypeObject __pyx_type_6hunter_8_actions___pyx_scope_struct_1_genexpr =
   #endif
 };
 
-static struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_2__iter_symbols *__pyx_freelist_6hunter_8_actions___pyx_scope_struct_2__iter_symbols[8];
-static int __pyx_freecount_6hunter_8_actions___pyx_scope_struct_2__iter_symbols = 0;
-
-static PyObject *__pyx_tp_new_6hunter_8_actions___pyx_scope_struct_2__iter_symbols(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
-  PyObject *o;
-  if (CYTHON_COMPILING_IN_CPYTHON && likely((__pyx_freecount_6hunter_8_actions___pyx_scope_struct_2__iter_symbols > 0) & (t->tp_basicsize == sizeof(struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_2__iter_symbols)))) {
-    o = (PyObject*)__pyx_freelist_6hunter_8_actions___pyx_scope_struct_2__iter_symbols[--__pyx_freecount_6hunter_8_actions___pyx_scope_struct_2__iter_symbols];
-    memset(o, 0, sizeof(struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_2__iter_symbols));
-    (void) PyObject_INIT(o, t);
-    PyObject_GC_Track(o);
-  } else {
-    o = (*t->tp_alloc)(t, 0);
-    if (unlikely(!o)) return 0;
-  }
-  return o;
-}
-
-static void __pyx_tp_dealloc_6hunter_8_actions___pyx_scope_struct_2__iter_symbols(PyObject *o) {
-  struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_2__iter_symbols *p = (struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_2__iter_symbols *)o;
-  PyObject_GC_UnTrack(o);
-  Py_CLEAR(p->__pyx_v_code);
-  Py_CLEAR(p->__pyx_v_node);
-  Py_CLEAR(p->__pyx_t_0);
-  if (CYTHON_COMPILING_IN_CPYTHON && ((__pyx_freecount_6hunter_8_actions___pyx_scope_struct_2__iter_symbols < 8) & (Py_TYPE(o)->tp_basicsize == sizeof(struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_2__iter_symbols)))) {
-    __pyx_freelist_6hunter_8_actions___pyx_scope_struct_2__iter_symbols[__pyx_freecount_6hunter_8_actions___pyx_scope_struct_2__iter_symbols++] = ((struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_2__iter_symbols *)o);
-  } else {
-    (*Py_TYPE(o)->tp_free)(o);
-  }
-}
-
-static int __pyx_tp_traverse_6hunter_8_actions___pyx_scope_struct_2__iter_symbols(PyObject *o, visitproc v, void *a) {
-  int e;
-  struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_2__iter_symbols *p = (struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_2__iter_symbols *)o;
-  if (p->__pyx_v_code) {
-    e = (*v)(p->__pyx_v_code, a); if (e) return e;
-  }
-  if (p->__pyx_v_node) {
-    e = (*v)(p->__pyx_v_node, a); if (e) return e;
-  }
-  if (p->__pyx_t_0) {
-    e = (*v)(p->__pyx_t_0, a); if (e) return e;
-  }
-  return 0;
-}
-
-static PyTypeObject __pyx_type_6hunter_8_actions___pyx_scope_struct_2__iter_symbols = {
-  PyVarObject_HEAD_INIT(0, 0)
-  "hunter._actions.__pyx_scope_struct_2__iter_symbols", /*tp_name*/
-  sizeof(struct __pyx_obj_6hunter_8_actions___pyx_scope_struct_2__iter_symbols), /*tp_basicsize*/
-  0, /*tp_itemsize*/
-  __pyx_tp_dealloc_6hunter_8_actions___pyx_scope_struct_2__iter_symbols, /*tp_dealloc*/
-  0, /*tp_print*/
-  0, /*tp_getattr*/
-  0, /*tp_setattr*/
-  #if PY_MAJOR_VERSION < 3
-  0, /*tp_compare*/
-  #endif
-  #if PY_MAJOR_VERSION >= 3
-  0, /*tp_as_async*/
-  #endif
-  0, /*tp_repr*/
-  0, /*tp_as_number*/
-  0, /*tp_as_sequence*/
-  0, /*tp_as_mapping*/
-  0, /*tp_hash*/
-  0, /*tp_call*/
-  0, /*tp_str*/
-  0, /*tp_getattro*/
-  0, /*tp_setattro*/
-  0, /*tp_as_buffer*/
-  Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_VERSION_TAG|Py_TPFLAGS_CHECKTYPES|Py_TPFLAGS_HAVE_NEWBUFFER|Py_TPFLAGS_HAVE_GC, /*tp_flags*/
-  0, /*tp_doc*/
-  __pyx_tp_traverse_6hunter_8_actions___pyx_scope_struct_2__iter_symbols, /*tp_traverse*/
-  0, /*tp_clear*/
-  0, /*tp_richcompare*/
-  0, /*tp_weaklistoffset*/
-  0, /*tp_iter*/
-  0, /*tp_iternext*/
-  0, /*tp_methods*/
-  0, /*tp_members*/
-  0, /*tp_getset*/
-  0, /*tp_base*/
-  0, /*tp_dict*/
-  0, /*tp_descr_get*/
-  0, /*tp_descr_set*/
-  0, /*tp_dictoffset*/
-  0, /*tp_init*/
-  0, /*tp_alloc*/
-  __pyx_tp_new_6hunter_8_actions___pyx_scope_struct_2__iter_symbols, /*tp_new*/
-  0, /*tp_free*/
-  0, /*tp_is_gc*/
-  0, /*tp_bases*/
-  0, /*tp_mro*/
-  0, /*tp_cache*/
-  0, /*tp_subclasses*/
-  0, /*tp_weaklist*/
-  0, /*tp_del*/
-  0, /*tp_version_tag*/
-  #if PY_VERSION_HEX >= 0x030400a1
-  0, /*tp_finalize*/
-  #endif
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-
 static PyMethodDef __pyx_methods[] = {
   {"safe_repr", (PyCFunction)(void*)(PyCFunctionWithKeywords)__pyx_pw_6hunter_8_actions_1safe_repr, METH_VARARGS|METH_KEYWORDS, 0},
   {"hasdict", (PyCFunction)(void*)(PyCFunctionWithKeywords)__pyx_pw_6hunter_8_actions_3hasdict, METH_VARARGS|METH_KEYWORDS, __pyx_doc_6hunter_8_actions_2hasdict},
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   {&__pyx_n_s_VarsPrinter, __pyx_k_VarsPrinter, sizeof(__pyx_k_VarsPrinter), 0, 0, 1, 1},
-  {&__pyx_n_s_VarsPrinter__iter_symbols, __pyx_k_VarsPrinter__iter_symbols, sizeof(__pyx_k_VarsPrinter__iter_symbols), 0, 0, 1, 1},
   {&__pyx_kp_s_VarsPrinter_requires_at_least_on, __pyx_k_VarsPrinter_requires_at_least_on, sizeof(__pyx_k_VarsPrinter_requires_at_least_on), 0, 0, 1, 0},
   {&__pyx_kp_s__15, __pyx_k__15, sizeof(__pyx_k__15), 0, 0, 1, 0},
   {&__pyx_kp_s__16, __pyx_k__16, sizeof(__pyx_k__16), 0, 0, 1, 0},
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   {&__pyx_n_s_items, __pyx_k_items, sizeof(__pyx_k_items), 0, 0, 1, 1},
-  {&__pyx_n_s_iter_symbols, __pyx_k_iter_symbols, sizeof(__pyx_k_iter_symbols), 0, 0, 1, 1},
   {&__pyx_n_s_java, __pyx_k_java, sizeof(__pyx_k_java), 0, 0, 1, 1},
   {&__pyx_n_s_join, __pyx_k_join, sizeof(__pyx_k_join), 0, 0, 1, 1},
   {&__pyx_n_s_klass, __pyx_k_klass, sizeof(__pyx_k_klass), 0, 0, 1, 1},
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   {&__pyx_n_s_name_2, __pyx_k_name_2, sizeof(__pyx_k_name_2), 0, 0, 1, 1},
   {&__pyx_n_s_new, __pyx_k_new, sizeof(__pyx_k_new), 0, 0, 1, 1},
-  {&__pyx_n_s_node, __pyx_k_node, sizeof(__pyx_k_node), 0, 0, 1, 1},
   {&__pyx_n_s_obj, __pyx_k_obj, sizeof(__pyx_k_obj), 0, 0, 1, 1},
   {&__pyx_n_s_obj_type, __pyx_k_obj_type, sizeof(__pyx_k_obj_type), 0, 0, 1, 1},
   {&__pyx_n_s_object, __pyx_k_object, sizeof(__pyx_k_object), 0, 0, 1, 1},
@@ -21367,8 +21109,6 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
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   {&__pyx_kp_s_source_failure_NO_SOURCE_source_2, __pyx_k_source_failure_NO_SOURCE_source_2, sizeof(__pyx_k_source_failure_NO_SOURCE_source_2), 0, 0, 1, 0},
   {&__pyx_n_s_splitlines, __pyx_k_splitlines, sizeof(__pyx_k_splitlines), 0, 0, 1, 1},
-  {&__pyx_kp_s_src_hunter__actions_pyx, __pyx_k_src_hunter__actions_pyx, sizeof(__pyx_k_src_hunter__actions_pyx), 0, 0, 1, 0},
-  {&__pyx_n_s_staticmethod, __pyx_k_staticmethod, sizeof(__pyx_k_staticmethod), 0, 0, 1, 1},
   {&__pyx_n_s_stream, __pyx_k_stream, sizeof(__pyx_k_stream), 0, 0, 1, 1},
   {&__pyx_n_s_strict, __pyx_k_strict, sizeof(__pyx_k_strict), 0, 0, 1, 1},
   {&__pyx_kp_s_stringsource, __pyx_k_stringsource, sizeof(__pyx_k_stringsource), 0, 0, 1, 0},
@@ -21393,7 +21133,6 @@ static __Pyx_StringTabEntry __pyx_string_tab[] = {
 };
 static CYTHON_SMALL_CODE int __Pyx_InitCachedBuiltins(void) {
   __pyx_builtin_ImportError = __Pyx_GetBuiltinName(__pyx_n_s_ImportError); if (!__pyx_builtin_ImportError) __PYX_ERR(0, 28, __pyx_L1_error)
-  __pyx_builtin_staticmethod = __Pyx_GetBuiltinName(__pyx_n_s_staticmethod); if (!__pyx_builtin_staticmethod) __PYX_ERR(0, 531, __pyx_L1_error)
   __pyx_builtin_BaseException = __Pyx_GetBuiltinName(__pyx_n_s_BaseException); if (!__pyx_builtin_BaseException) __PYX_ERR(0, 93, __pyx_L1_error)
   __pyx_builtin_object = __Pyx_GetBuiltinName(__pyx_n_s_object); if (!__pyx_builtin_object) __PYX_ERR(0, 110, __pyx_L1_error)
   __pyx_builtin_NotImplementedError = __Pyx_GetBuiltinName(__pyx_n_s_NotImplementedError); if (!__pyx_builtin_NotImplementedError) __PYX_ERR(0, 138, __pyx_L1_error)
@@ -21401,9 +21140,9 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedBuiltins(void) {
   __pyx_builtin_open = __Pyx_GetBuiltinName(__pyx_n_s_open); if (!__pyx_builtin_open) __PYX_ERR(0, 245, __pyx_L1_error)
   __pyx_builtin_TypeError = __Pyx_GetBuiltinName(__pyx_n_s_TypeError); if (!__pyx_builtin_TypeError) __PYX_ERR(0, 270, __pyx_L1_error)
   __pyx_builtin_super = __Pyx_GetBuiltinName(__pyx_n_s_super); if (!__pyx_builtin_super) __PYX_ERR(0, 403, __pyx_L1_error)
-  __pyx_builtin_eval = __Pyx_GetBuiltinName(__pyx_n_s_eval); if (!__pyx_builtin_eval) __PYX_ERR(0, 576, __pyx_L1_error)
-  __pyx_builtin_vars = __Pyx_GetBuiltinName(__pyx_n_s_vars); if (!__pyx_builtin_vars) __PYX_ERR(0, 576, __pyx_L1_error)
-  __pyx_builtin_AttributeError = __Pyx_GetBuiltinName(__pyx_n_s_AttributeError); if (!__pyx_builtin_AttributeError) __PYX_ERR(0, 577, __pyx_L1_error)
+  __pyx_builtin_eval = __Pyx_GetBuiltinName(__pyx_n_s_eval); if (!__pyx_builtin_eval) __PYX_ERR(0, 578, __pyx_L1_error)
+  __pyx_builtin_vars = __Pyx_GetBuiltinName(__pyx_n_s_vars); if (!__pyx_builtin_vars) __PYX_ERR(0, 578, __pyx_L1_error)
+  __pyx_builtin_AttributeError = __Pyx_GetBuiltinName(__pyx_n_s_AttributeError); if (!__pyx_builtin_AttributeError) __PYX_ERR(0, 579, __pyx_L1_error)
   return 0;
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@@ -21440,7 +21179,7 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
  *         if not names:
  *             raise TypeError('VarsPrinter requires at least one variable name/expression.')             # <<<<<<<<<<<<<<
  *         self.names = {
- *             name: set(self._iter_symbols(name))
+ *             name: VarsPrinter._get_symbols(name)
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   __pyx_tuple__22 = PyTuple_Pack(1, __pyx_kp_s_VarsPrinter_requires_at_least_on); if (unlikely(!__pyx_tuple__22)) __PYX_ERR(0, 524, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_tuple__22);
@@ -21453,9 +21192,9 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
  *                  force_colors=config.Default('force_colors', False),
  *                  force_pid=config.Default('force_pid', False),
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-  __pyx_tuple__24 = PyTuple_Pack(2, __pyx_n_s_stream, Py_None); if (unlikely(!__pyx_tuple__24)) __PYX_ERR(0, 192, __pyx_L1_error)
-  __Pyx_GOTREF(__pyx_tuple__24);
-  __Pyx_GIVEREF(__pyx_tuple__24);
+  __pyx_tuple__23 = PyTuple_Pack(2, __pyx_n_s_stream, Py_None); if (unlikely(!__pyx_tuple__23)) __PYX_ERR(0, 192, __pyx_L1_error)
+  __Pyx_GOTREF(__pyx_tuple__23);
+  __Pyx_GIVEREF(__pyx_tuple__23);
 
   /* "hunter/_actions.pyx":193
  *     def __init__(self,
@@ -21464,9 +21203,9 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
  *                  force_pid=config.Default('force_pid', False),
  *                  filename_alignment=config.Default('filename_alignment', 40),
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-  __pyx_tuple__25 = PyTuple_Pack(2, __pyx_n_s_force_colors, Py_False); if (unlikely(!__pyx_tuple__25)) __PYX_ERR(0, 193, __pyx_L1_error)
-  __Pyx_GOTREF(__pyx_tuple__25);
-  __Pyx_GIVEREF(__pyx_tuple__25);
+  __pyx_tuple__24 = PyTuple_Pack(2, __pyx_n_s_force_colors, Py_False); if (unlikely(!__pyx_tuple__24)) __PYX_ERR(0, 193, __pyx_L1_error)
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+  __Pyx_GIVEREF(__pyx_tuple__24);
 
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@@ -21475,9 +21214,9 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
  *                  filename_alignment=config.Default('filename_alignment', 40),
  *                  thread_alignment=config.Default('thread_alignment', 12),
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-  __pyx_tuple__26 = PyTuple_Pack(2, __pyx_n_s_force_pid, Py_False); if (unlikely(!__pyx_tuple__26)) __PYX_ERR(0, 194, __pyx_L1_error)
-  __Pyx_GOTREF(__pyx_tuple__26);
-  __Pyx_GIVEREF(__pyx_tuple__26);
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  *                  force_colors=config.Default('force_colors', False),
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  *                  thread_alignment=config.Default('thread_alignment', 12),
  *                  pid_alignment=config.Default('pid_alignment', 9),
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-  __pyx_tuple__27 = PyTuple_Pack(2, __pyx_n_s_filename_alignment, __pyx_int_40); if (unlikely(!__pyx_tuple__27)) __PYX_ERR(0, 195, __pyx_L1_error)
-  __Pyx_GOTREF(__pyx_tuple__27);
-  __Pyx_GIVEREF(__pyx_tuple__27);
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+  __Pyx_GIVEREF(__pyx_tuple__26);
 
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  *                  pid_alignment=config.Default('pid_alignment', 9),
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-  __pyx_tuple__28 = PyTuple_Pack(2, __pyx_n_s_thread_alignment, __pyx_int_12); if (unlikely(!__pyx_tuple__28)) __PYX_ERR(0, 196, __pyx_L1_error)
-  __Pyx_GOTREF(__pyx_tuple__28);
-  __Pyx_GIVEREF(__pyx_tuple__28);
+  __pyx_tuple__27 = PyTuple_Pack(2, __pyx_n_s_thread_alignment, __pyx_int_12); if (unlikely(!__pyx_tuple__27)) __PYX_ERR(0, 196, __pyx_L1_error)
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+  __Pyx_GIVEREF(__pyx_tuple__27);
 
   /* "hunter/_actions.pyx":197
  *                  filename_alignment=config.Default('filename_alignment', 40),
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  *                  repr_limit=config.Default('repr_limit', 1024),
  *                  repr_func=config.Default('repr_func', 'safe_repr')):
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-  __pyx_tuple__29 = PyTuple_Pack(2, __pyx_n_s_pid_alignment, __pyx_int_9); if (unlikely(!__pyx_tuple__29)) __PYX_ERR(0, 197, __pyx_L1_error)
-  __Pyx_GOTREF(__pyx_tuple__29);
-  __Pyx_GIVEREF(__pyx_tuple__29);
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+  __Pyx_GOTREF(__pyx_tuple__28);
+  __Pyx_GIVEREF(__pyx_tuple__28);
 
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  *                  repr_func=config.Default('repr_func', 'safe_repr')):
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-  __pyx_tuple__30 = PyTuple_Pack(2, __pyx_n_s_repr_limit, __pyx_int_1024); if (unlikely(!__pyx_tuple__30)) __PYX_ERR(0, 198, __pyx_L1_error)
-  __Pyx_GOTREF(__pyx_tuple__30);
-  __Pyx_GIVEREF(__pyx_tuple__30);
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+  __Pyx_GOTREF(__pyx_tuple__29);
+  __Pyx_GIVEREF(__pyx_tuple__29);
 
   /* "hunter/_actions.pyx":199
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@@ -21530,55 +21269,43 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
  *         self.force_colors = config.resolve(force_colors)
  *         self.force_pid = config.resolve(force_pid)
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-  __pyx_tuple__31 = PyTuple_Pack(2, __pyx_n_s_repr_func, __pyx_n_s_safe_repr); if (unlikely(!__pyx_tuple__31)) __PYX_ERR(0, 199, __pyx_L1_error)
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-  /* "hunter/_actions.pyx":532
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@@ -26118,26 +25811,6 @@ static CYTHON_INLINE void __Pyx_CyFunction_SetAnnotationsDict(PyObject *func, Py
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diff --git a/src/hunter/_actions.pxd b/src/hunter/_actions.pxd
index 7002b2e..342dad7 100644
--- a/src/hunter/_actions.pxd
+++ b/src/hunter/_actions.pxd
@@ -48,6 +48,9 @@ cdef class VarsPrinter(ColorStreamAction):
     cdef:
         public dict names
 
+    @staticmethod
+    cdef _get_symbols(code)
+
 cdef fast_CodePrinter_call(CodePrinter self, Event event)
 cdef fast_CallPrinter_call(CallPrinter self, Event event)
 cdef fast_VarsPrinter_call(VarsPrinter self, Event event)
diff --git a/src/hunter/_actions.pyx b/src/hunter/_actions.pyx
index e371d01..01e748d 100644
--- a/src/hunter/_actions.pyx
+++ b/src/hunter/_actions.pyx
@@ -523,13 +523,13 @@ cdef class VarsPrinter(ColorStreamAction):
         if not names:
             raise TypeError('VarsPrinter requires at least one variable name/expression.')
         self.names = {
-            name: set(self._iter_symbols(name))
+            name: VarsPrinter._get_symbols(name)
             for name in names
         }
         super(VarsPrinter, self).__init__(**options)
 
     @staticmethod
-    def _iter_symbols(code):
+    cdef _get_symbols(code):
         """
         Iterate all the variable names in the given expression.
 
@@ -538,9 +538,11 @@ cdef class VarsPrinter(ColorStreamAction):
         * ``self.foobar`` yields ``self``
         * ``self[foobar]`` yields `self`` and ``foobar``
         """
+        symbols = set()
         for node in ast.walk(ast.parse(code)):
             if isinstance(node, ast.Name):
-                yield node.id
+                symbols.add(node.id)
+        return symbols
 
     def __call__(self, event):
         """
diff --git a/src/hunter/_predicates.c b/src/hunter/_predicates.c
index 0b6a046..dbf175a 100644
--- a/src/hunter/_predicates.c
+++ b/src/hunter/_predicates.c
@@ -1342,6 +1342,7 @@ static struct __pyx_vtabstruct_6hunter_8_actions_CallPrinter *__pyx_vtabptr_6hun
 
 struct __pyx_vtabstruct_6hunter_8_actions_VarsPrinter {
   struct __pyx_vtabstruct_6hunter_8_actions_ColorStreamAction __pyx_base;
+  PyObject *(*_get_symbols)(struct __pyx_obj_6hunter_8_actions_VarsPrinter *);
 };
 static struct __pyx_vtabstruct_6hunter_8_actions_VarsPrinter *__pyx_vtabptr_6hunter_8_actions_VarsPrinter;
 
diff --git a/src/hunter/_tracer.c b/src/hunter/_tracer.c
index 49a01c8..d3e12d4 100644
--- a/src/hunter/_tracer.c
+++ b/src/hunter/_tracer.c
@@ -1145,6 +1145,7 @@ static struct __pyx_vtabstruct_6hunter_8_actions_CallPrinter *__pyx_vtabptr_6hun
 
 struct __pyx_vtabstruct_6hunter_8_actions_VarsPrinter {
   struct __pyx_vtabstruct_6hunter_8_actions_ColorStreamAction __pyx_base;
+  PyObject *(*_get_symbols)(struct __pyx_obj_6hunter_8_actions_VarsPrinter *);
 };
 static struct __pyx_vtabstruct_6hunter_8_actions_VarsPrinter *__pyx_vtabptr_6hunter_8_actions_VarsPrinter;