Implement missing python special methods. (#467)

snippets/python-mode/__aenter__

@@ -0,0 +1,8 @@
+# -*- mode: snippet -*-
+# name: __aenter__
+# key: _aenter
+# group: Special methods
+# --
+async def __aenter__(self):
+    $0
+    return self

snippets/python-mode/__aexit__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __aexit__
+# key: _aexit
+# group: Special methods
+# --
+async def __aexit__(self, exc_type, exc_value, traceback):
+    $0

snippets/python-mode/__aiter__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __aiter__
+# key: _aiter
+# group: Special methods
+# --
+def __aiter__(self):
+    return $0

snippets/python-mode/__anext__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __anext__
+# key: _anext
+# group: Special methods
+# --
+async def __anext__(self):
+    return $0

snippets/python-mode/__await__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __await__
+# key: _await
+# group: Special methods
+# --
+def __await__(self):
+    $0

snippets/python-mode/__bytes__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __bytes__
+# key: _bytes
+# group: Special methods
+# --
+def __bytes__(self):
+    return $0

snippets/python-mode/__ceil__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __ceil__
+# key: _ceil
+# group: Special methods
+# --
+def __ceil__(self):
+    return $0

snippets/python-mode/__class_getitem__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __class_getitem__
+# key: _class_getitem
+# group: Special methods
+# --
+def __class_getitem__(cls, key):
+    return $0

snippets/python-mode/__dir__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __dir__
+# key: _dir
+# group: Special methods
+# --
+def __dir__(self):
+    return $0

snippets/python-mode/__floor__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __floor__
+# key: _floor
+# group: Special methods
+# --
+def __floor__(self):
+    return $0

snippets/python-mode/__format__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __format__
+# key: _format
+# group: Special methods
+# --
+def __format__(self, format_spec):
+    return $0

snippets/python-mode/__imatmul__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __imatmul__
+# key: _imatmul
+# group: Special methods
+# --
+def __imatmul__(self, other):
+    return $0

snippets/python-mode/__init_subclass__

@@ -0,0 +1,8 @@
+# -*- mode: snippet -*-
+# name: __init_subclass__
+# key: _init_subclass
+# group: Special methods
+# --
+def __init_subclass__(cls, /${1:, param}, **kwargs):
+    super().__init_subclass__(**kwargs)
+    $0

snippets/python-mode/__length_hint__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __length_hint__
+# key: _length_hint
+# group: Special methods
+# --
+def __length_hint__(self):
+    return $0

snippets/python-mode/__matmul__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __matmul__
+# key: _matmul
+# group: Special methods
+# --
+def __matmul__(self, other):
+    return $0

snippets/python-mode/__missing__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __missing__
+# key: _missing
+# group: Special methods
+# --
+def __missing__(self):
+    return $0

snippets/python-mode/__prepare__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __prepare__
+# key: _prepare
+# group: Special methods
+# --
+def __prepare__(name, bases, **kwds):
+    return ${0:\{\}}

snippets/python-mode/__rmatmul__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __rmatmul__
+# key: _rmatmul
+# group: Special methods
+# --
+def __rmatmul__(self, other):
+    return $0

snippets/python-mode/__round__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __round__
+# key: _round
+# group: Special methods
+# --
+def __round__(self, ndigits=None):
+    return $0

snippets/python-mode/__set_name__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __set_name__
+# key: _set_name
+# group: Special methods
+# --
+def __set_name__(self, owner, name):
+    $0

snippets/python-mode/__trunc__

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: __trunc__
+# key: _trunc
+# group: Special methods
+# --
+def __trunc__(self):
+    return $0