diff --git a/photoshop/api/action_manager/__init__.py b/photoshop/api/action_manager/__init__.py
index a579d1e8..b9ab3d35 100644
--- a/photoshop/api/action_manager/__init__.py
+++ b/photoshop/api/action_manager/__init__.py
@@ -1,8 +1,15 @@
-from .desc_value_types import *
-from .jprint import *
+from .desc_value_types import Enumerated
+from .desc_value_types import TypeID
+from .desc_value_types import UnitDouble
+from .jprint import jformat
+from .jprint import jprint
 from .js_converter import dump as dumpjs
-from .ref_form_types import *
-from .utils import *
+from .ref_form_types import Identifier
+from .ref_form_types import Index
+from .ref_form_types import Offset
+from .ref_form_types import ReferenceKey
+from .utils import id2str
+from .utils import str2id
 
 
 __all__ = [  # noqa: F405
diff --git a/photoshop/api/action_manager/_main_types/_type_mapper.py b/photoshop/api/action_manager/_main_types/_type_mapper.py
index 06f5b88c..37016520 100644
--- a/photoshop/api/action_manager/_main_types/_type_mapper.py
+++ b/photoshop/api/action_manager/_main_types/_type_mapper.py
@@ -2,9 +2,10 @@
 Handles almost all type mappings. (Some else are in ReferenceKey.)
 This module is INTERNAL. You should not import functions from it."""
 
-from ..desc_value_types import *
-from ..ref_form_types import *
-from ..utils import *
+from ..desc_value_types import Enumerated
+from ..desc_value_types import TypeID
+from ..desc_value_types import UnitDouble
+from ..utils import id2str
 
 
 __all__ = ["unpack", "pack", "parsetype"]
@@ -34,7 +35,7 @@ def unpack(val):
     typestr = pytype2str[vtype]
     try:
         args = val._unpacker()
-    except:
+    except BaseException:
         args = (val,)
     return (typestr, args)
 
diff --git a/photoshop/api/action_manager/_main_types/action_descriptor.py b/photoshop/api/action_manager/_main_types/action_descriptor.py
index 70256db8..3208afad 100644
--- a/photoshop/api/action_manager/_main_types/action_descriptor.py
+++ b/photoshop/api/action_manager/_main_types/action_descriptor.py
@@ -3,12 +3,14 @@
 from abc import abstractclassmethod
 from typing import Any
 
-from ..utils import *
-from ._type_mapper import *
+from ..utils import str2id
+from ._type_mapper import pack
+from ._type_mapper import parsetype
+from ._type_mapper import unpack
 from .action_descriptor_iterator import ActionDescriptor_Iterator
 
 
-class ActionDescriptor:
+class ActionDescriptor(ABC):
     """A vessel for my extra utils.
     You should not use, and cannot initialize it
     because it is an abstract class."""
diff --git a/photoshop/api/action_manager/_main_types/action_descriptor_iterator.py b/photoshop/api/action_manager/_main_types/action_descriptor_iterator.py
index 066a8069..e2ee3303 100644
--- a/photoshop/api/action_manager/_main_types/action_descriptor_iterator.py
+++ b/photoshop/api/action_manager/_main_types/action_descriptor_iterator.py
@@ -1,10 +1,10 @@
-from ..utils import *
+from ..utils import id2str
 
 
 class ActionDescriptor_Iterator:
     """An iterator. You don't need to initialize it manually."""
 
-    def __init__(self, psobj: "ActionDescriptor"):
+    def __init__(self, psobj):
         self.curobj = psobj
         self.n = -1
 
@@ -12,7 +12,7 @@ def __next__(self) -> str:
         self.n += 1
         try:
             keyid = self.curobj.getKey(self.n)
-        except:
+        except BaseException:
             raise StopIteration
         keystr = id2str(keyid)
         return keystr
diff --git a/photoshop/api/action_manager/_main_types/action_list.py b/photoshop/api/action_manager/_main_types/action_list.py
index 5d719bf8..601cef73 100644
--- a/photoshop/api/action_manager/_main_types/action_list.py
+++ b/photoshop/api/action_manager/_main_types/action_list.py
@@ -3,8 +3,9 @@
 from abc import abstractclassmethod
 from typing import Any
 
-from ..utils import *
-from ._type_mapper import *
+from ._type_mapper import pack
+from ._type_mapper import parsetype
+from ._type_mapper import unpack
 from .action_list_iterator import ActionList_Iterator
 
 
diff --git a/photoshop/api/action_manager/_main_types/action_list_iterator.py b/photoshop/api/action_manager/_main_types/action_list_iterator.py
index 9de7e352..b269ea56 100644
--- a/photoshop/api/action_manager/_main_types/action_list_iterator.py
+++ b/photoshop/api/action_manager/_main_types/action_list_iterator.py
@@ -5,7 +5,7 @@
 class ActionList_Iterator:
     """An iterator. You don't need to initialize it manually."""
 
-    def __init__(self, psobj: "ActionList"):
+    def __init__(self, psobj):
         self.curobj = psobj
         self.n = -1
 
@@ -13,7 +13,7 @@ def __next__(self) -> Any:
         self.n += 1
         try:
             elem = self.curobj.uget(self.n)
-        except:
+        except BaseException:
             raise StopIteration()
         return elem
 
diff --git a/photoshop/api/action_manager/_main_types/action_reference.py b/photoshop/api/action_manager/_main_types/action_reference.py
index 75f57680..d35bb5ba 100644
--- a/photoshop/api/action_manager/_main_types/action_reference.py
+++ b/photoshop/api/action_manager/_main_types/action_reference.py
@@ -28,7 +28,7 @@ def uget(self, index: int) -> ReferenceKey:
         for i in range(index + 1):
             try:
                 target = target.getContainer()
-            except:
+            except BaseException:
                 raise IndexError("index out of range")
         return ReferenceKey._packer(target)
 
@@ -42,7 +42,6 @@ def uput(self, rkey: ReferenceKey):
 
     def dump(self) -> list:
         """Convert an ActionReference to a python object."""
-        target = self
         tlist = ["!ref"]
         tlist.extend([elem for elem in self])
         return tlist
@@ -54,7 +53,7 @@ def __len__(self):
             try:
                 target = target.getContainer()
                 rlen += 1
-            except:
+            except BaseException:
                 rlen -= 1
                 break
         return rlen
diff --git a/photoshop/api/action_manager/_main_types/action_reference_iterator.py b/photoshop/api/action_manager/_main_types/action_reference_iterator.py
index 6eb6e8d9..2f93ac29 100644
--- a/photoshop/api/action_manager/_main_types/action_reference_iterator.py
+++ b/photoshop/api/action_manager/_main_types/action_reference_iterator.py
@@ -4,7 +4,7 @@
 class ActionReference_Iterator:
     """An iterator. You don't need to initialize it manually."""
 
-    def __init__(self, psobj: "ActionReference"):
+    def __init__(self, psobj):
         self.curobj = psobj
         self.init = True
         self.n = -1
@@ -17,7 +17,7 @@ def __next__(self) -> ReferenceKey:
         self.curobj = self.curobj.getContainer()
         try:
             self.curobj.getContainer()
-        except:
+        except BaseException:
             raise StopIteration
         return ReferenceKey._packer(self.curobj)
 
diff --git a/photoshop/api/action_manager/desc_value_types/enumerated.py b/photoshop/api/action_manager/desc_value_types/enumerated.py
index bc97b00a..97607b2e 100644
--- a/photoshop/api/action_manager/desc_value_types/enumerated.py
+++ b/photoshop/api/action_manager/desc_value_types/enumerated.py
@@ -1,7 +1,8 @@
 # Import built-in modules
 from collections import namedtuple
 
-from ..utils import *
+from ..utils import id2str
+from ..utils import str2id
 
 
 Enumerated_proto = namedtuple("Enumerated_proto", ["type", "value"])
diff --git a/photoshop/api/action_manager/desc_value_types/typeid.py b/photoshop/api/action_manager/desc_value_types/typeid.py
index 2897f352..0fc10a19 100644
--- a/photoshop/api/action_manager/desc_value_types/typeid.py
+++ b/photoshop/api/action_manager/desc_value_types/typeid.py
@@ -1,7 +1,8 @@
 # Import built-in modules
 from collections import namedtuple
 
-from ..utils import *
+from ..utils import id2str
+from ..utils import str2id
 
 
 TypeID_proto = namedtuple("TypeID_proto", ["string"])
diff --git a/photoshop/api/action_manager/desc_value_types/unitdouble.py b/photoshop/api/action_manager/desc_value_types/unitdouble.py
index 83b734bd..0d0ee5a9 100644
--- a/photoshop/api/action_manager/desc_value_types/unitdouble.py
+++ b/photoshop/api/action_manager/desc_value_types/unitdouble.py
@@ -1,7 +1,8 @@
 # Import built-in modules
 from collections import namedtuple
 
-from ..utils import *
+from ..utils import id2str
+from ..utils import str2id
 
 
 UnitDouble_proto = namedtuple("UnitDouble_proto", ["unit", "double"])
diff --git a/photoshop/api/action_manager/jprint.py b/photoshop/api/action_manager/jprint.py
index 56e2d72f..fe1daf4f 100644
--- a/photoshop/api/action_manager/jprint.py
+++ b/photoshop/api/action_manager/jprint.py
@@ -52,7 +52,7 @@ def jformat(astr, indent=4, prefix=None):
                 indent_level -= 1
                 char = "\n" + " " * (indent * indent_level) + char
         nstr += char
-    if not prefix is None:
+    if prefix is not None:
         for kwd in all_am_keywords:
             nstr = nstr.replace(kwd, prefix + "." + kwd)
     return nstr
diff --git a/photoshop/api/action_manager/js_converter/__init__.py b/photoshop/api/action_manager/js_converter/__init__.py
index 2d29a8f1..b12651f5 100644
--- a/photoshop/api/action_manager/js_converter/__init__.py
+++ b/photoshop/api/action_manager/js_converter/__init__.py
@@ -1 +1,4 @@
 from .convert import dump
+
+
+__all__ = ["dump"]
diff --git a/photoshop/api/action_manager/js_converter/convert.py b/photoshop/api/action_manager/js_converter/convert.py
index cfe671c7..6f84fa82 100644
--- a/photoshop/api/action_manager/js_converter/convert.py
+++ b/photoshop/api/action_manager/js_converter/convert.py
@@ -6,12 +6,15 @@
 # Import built-in modules
 import json
 
-from ..desc_value_types import *
-from ..ref_form_types import *
-from ..utils import hash2str
+from ..desc_value_types import Enumerated
+from ..desc_value_types import TypeID
+from ..desc_value_types import UnitDouble
+from ..ref_form_types import Identifier
+from ..ref_form_types import Index
+from ..ref_form_types import Offset
+from ..ref_form_types import ReferenceKey
 from ..utils import id2str
 from ..utils import str2hash
-from ..utils import str2id
 from .injection_js import injection
 from .node_execjs import execjs
 
@@ -59,7 +62,7 @@ def unhead(string):
 
 
 def parsedict(tdict):
-    if not "_classID" in tdict:
+    if "_classID" not in tdict:
         tdict["_classID"] = None
     else:
         tdict["_classID"] = unhead(tdict["_classID"])
diff --git a/photoshop/api/action_manager/js_converter/injection_js.py b/photoshop/api/action_manager/js_converter/injection_js.py
index db14ad05..6d2c07a4 100644
--- a/photoshop/api/action_manager/js_converter/injection_js.py
+++ b/photoshop/api/action_manager/js_converter/injection_js.py
@@ -1,3 +1,5 @@
+# flake8: noqa
+
 """Defines injection, a variable which contains js code.
 These js code implements Photoshop functions, and lures a piece of js code
 to output all its information on executing executeAction function.
diff --git a/photoshop/api/action_manager/js_converter/node_execjs.py b/photoshop/api/action_manager/js_converter/node_execjs.py
index 0604c6a8..a8789a49 100644
--- a/photoshop/api/action_manager/js_converter/node_execjs.py
+++ b/photoshop/api/action_manager/js_converter/node_execjs.py
@@ -8,7 +8,7 @@
 
 # Node.js check
 nodestate = os.popen("node --version")
-if not re.match("^v\d*\.\d*\.\d*", nodestate.read()):
+if not re.match(r"^v\d*\.\d*\.\d*", nodestate.read()):
     raise RuntimeError("Please check if Node.js is installed to PATH!")
 
 
diff --git a/photoshop/api/action_manager/ref_form_types/_marker.py b/photoshop/api/action_manager/ref_form_types/_marker.py
index 50d60fec..5a0c20b2 100644
--- a/photoshop/api/action_manager/ref_form_types/_marker.py
+++ b/photoshop/api/action_manager/ref_form_types/_marker.py
@@ -16,5 +16,5 @@ def __repr__(self):
     def __eq__(self, other):
         try:
             return self.name == other.name and self.value == other.value
-        except:
+        except BaseException:
             return False
diff --git a/photoshop/api/action_manager/ref_form_types/referencekey.py b/photoshop/api/action_manager/ref_form_types/referencekey.py
index 955478b4..20e5333d 100644
--- a/photoshop/api/action_manager/ref_form_types/referencekey.py
+++ b/photoshop/api/action_manager/ref_form_types/referencekey.py
@@ -9,11 +9,14 @@
 
 from ..desc_value_types import Enumerated
 from ..desc_value_types import TypeID
-from ..utils import *
+from ..utils import id2str
+from ..utils import str2id
 from ._marker import marker
-from .identifier import Identifier
-from .index import Index
-from .offset import Offset
+
+# Identifier, Index, Offset are used by getting them in globals().
+from .identifier import Identifier  # noqa: F401
+from .index import Index  # noqa: F401
+from .offset import Offset  # noqa: F401
 
 
 psreftype2str = {
@@ -31,7 +34,7 @@ def _packer(cls, obj):
         dcls = id2str(obj.getDesiredClass())
         try:
             get_func = getattr(obj, "get" + ftype)
-        except:
+        except BaseException:
             get_func = None
         if ftype == "Class":
             v = None
diff --git a/photoshop/api/action_manager/utils.py b/photoshop/api/action_manager/utils.py
index 293238e0..69464515 100644
--- a/photoshop/api/action_manager/utils.py
+++ b/photoshop/api/action_manager/utils.py
@@ -42,7 +42,7 @@ def str2id(psstr: str) -> str:
         typeid = str2hash(psstr)
         try:
             restr = converter.id2str(psstr)
-        except:
+        except BaseException:
             restr = ""
         if not restr:
             typeid = converter.str2id(psstr)