remove sys.version_info bridges from the production codebase

comtypes/GUID.py

@@ -1,23 +1,10 @@
 from ctypes import *
 import sys
 
-if sys.version_info >= (2, 6):
 
-    def binary(obj):
-        return bytes(obj)
+def binary(obj):
+    return bytes(obj)
 
-else:
-
-    def binary(obj):
-        return buffer(obj)
-
-
-if sys.version_info >= (3, 0):
-    text_type = str
-    base_text_type = str
-else:
-    text_type = unicode
-    base_text_type = basestring
 
 BYTE = c_byte
 WORD = c_ushort
@@ -41,10 +28,10 @@ class GUID(Structure):
 
     def __init__(self, name=None):
         if name is not None:
-            _CLSIDFromString(text_type(name), byref(self))
+            _CLSIDFromString(str(name), byref(self))
 
     def __repr__(self):
-        return 'GUID("%s")' % text_type(self)
+        return 'GUID("%s")' % str(self)
 
     def __unicode__(self):
         p = c_wchar_p()
@@ -71,7 +58,7 @@ def __hash__(self):
         return hash(binary(self))
 
     def copy(self):
-        return GUID(text_type(self))
+        return GUID(str(self))
 
     @classmethod
     def from_progid(cls, progid):
@@ -80,11 +67,11 @@ def from_progid(cls, progid):
             progid = progid._reg_clsid_
         if isinstance(progid, cls):
             return progid
-        elif isinstance(progid, base_text_type):
+        elif isinstance(progid, str):
             if progid.startswith("{"):
                 return cls(progid)
             inst = cls()
-            _CLSIDFromProgID(text_type(progid), byref(inst))
+            _CLSIDFromProgID(str(progid), byref(inst))
             return inst
         else:
             raise TypeError("Cannot construct guid from %r" % progid)

comtypes/__init__.py

@@ -52,53 +52,6 @@
 )
 
 
-################################################################
-
-# fmt: off
-def add_metaclass(metaclass):
-    """Class decorator from six.py for creating a class with a metaclass.
-
-    Copyright (c) 2010-2020 Benjamin Peterson
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy of
-    this software and associated documentation files (the "Software"), to deal in
-    the Software without restriction, including without limitation the rights to
-    use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-    the Software, and to permit persons to whom the Software is furnished to do so,
-    subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in all
-    copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-    FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-    COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-    IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-    CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-    """
-    def wrapper(cls):
-        orig_vars = cls.__dict__.copy()
-        slots = orig_vars.get('__slots__')
-        if slots is not None:
-            if isinstance(slots, text_type):
-                slots = [slots]
-            for slots_var in slots:
-                orig_vars.pop(slots_var)
-        orig_vars.pop('__dict__', None)
-        orig_vars.pop('__weakref__', None)
-        if hasattr(cls, '__qualname__'):
-            orig_vars['__qualname__'] = cls.__qualname__
-        return metaclass(cls.__name__, cls.__bases__, orig_vars)
-    return wrapper
-# fmt: on
-
-
-################################################################
-if sys.version_info >= (3, 0):
-    text_type = str
-else:
-    text_type = unicode
 _all_slice = slice(None, None, None)
 
 
@@ -134,21 +87,16 @@ def _check_version(actual, tlib_cached_mtime=None):
             raise ImportError("Typelib different than module")
 
 
-if sys.version_info >= (3, 0):
-    pythonapi.PyInstanceMethod_New.argtypes = [py_object]
-    pythonapi.PyInstanceMethod_New.restype = py_object
-    PyInstanceMethod_Type = type(pythonapi.PyInstanceMethod_New(id))
+pythonapi.PyInstanceMethod_New.argtypes = [py_object]
+pythonapi.PyInstanceMethod_New.restype = py_object
+PyInstanceMethod_Type = type(pythonapi.PyInstanceMethod_New(id))
 
-    def instancemethod(func, inst, cls):
-        mth = PyInstanceMethod_Type(func)
-        if inst is None:
-            return mth
-        return mth.__get__(inst)
 
-else:
-
-    def instancemethod(func, inst, cls):
-        return types.MethodType(func, inst, cls)
+def instancemethod(func, inst, cls):
+    mth = PyInstanceMethod_Type(func)
+    if inst is None:
+        return mth
+    return mth.__get__(inst)
 
 
 class ReturnHRESULT(Exception):
@@ -587,7 +535,7 @@ def _make_methods(self, methods):
         except KeyError:
             raise AttributeError("this class must define an _iid_")
         else:
-            com_interface_registry[text_type(iid)] = self
+            com_interface_registry[str(iid)] = self
         # create members
         vtbl_offset = self.__get_baseinterface_methodcount()
         member_gen = ComMemberGenerator(self.__name__, vtbl_offset, self._iid_)
@@ -627,8 +575,7 @@ class _compointer_meta(type(c_void_p), _cominterface_meta):
     # no functionality, but needed to avoid a metaclass conflict
 
 
-@add_metaclass(_compointer_meta)
-class _compointer_base(c_void_p):
+class _compointer_base(c_void_p, metaclass=_compointer_meta):
     "base class for COM interface pointer classes"
 
     def __del__(self, _debug=logger.debug):
@@ -757,7 +704,7 @@ def from_param(cls, value):
 # IDL stuff
 
 
-class helpstring(text_type):
+class helpstring(str):
     "Specifies the helpstring for a COM method or property."
 
 
@@ -830,7 +777,7 @@ def COMMETHOD(idlflags, restype, methodname, *argspec):
 
 if TYPE_CHECKING:
 
-    class _IUnknown_Base(c_void_p):
+    class _IUnknown_Base(c_void_p, metaclass=_cominterface_meta):
         """This is workaround to avoid false-positive of static type checking.
 
         `IUnknown` behaves as a ctypes type, and `POINTER` can take it.
@@ -848,8 +795,7 @@ class _IUnknown_Base(c_void_p):
     _IUnknown_Base = object
 
 
-@add_metaclass(_cominterface_meta)
-class IUnknown(_IUnknown_Base):
+class IUnknown(_IUnknown_Base, metaclass=_cominterface_meta):
     """The most basic COM interface.
 
     Each subclasses of IUnknown must define these class attributes:
@@ -963,9 +909,7 @@ def CoGetObject(displayname, interface):
         interface = IUnknown
     punk = POINTER(interface)()
     # Do we need a way to specify the BIND_OPTS parameter?
-    _ole32.CoGetObject(
-        text_type(displayname), None, byref(interface._iid_), byref(punk)
-    )
+    _ole32.CoGetObject(str(displayname), None, byref(interface._iid_), byref(punk))
     return punk  # type: ignore
 
 
@@ -1236,8 +1180,7 @@ def CoCreateInstanceEx(
 from comtypes._meta import _coclass_meta
 
 
-@add_metaclass(_coclass_meta)
-class CoClass(COMObject):
+class CoClass(COMObject, metaclass=_coclass_meta):
     pass
 
 

comtypes/_comobject.py

@@ -13,6 +13,7 @@
 from _ctypes import CopyComPointer
 import logging
 import os
+import queue
 import sys
 
 from comtypes import COMError, ReturnHRESULT, instancemethod, _encode_idl
@@ -37,11 +38,6 @@
 _warning = logger.warning
 _error = logger.error
 
-if sys.version_info >= (3, 0):
-    int_types = (int,)
-else:
-    int_types = (int, long)
-
 ################################################################
 # COM object implementation
 
@@ -72,7 +68,7 @@ def winerror(exc):
         return exc.hresult
     elif isinstance(exc, WindowsError):
         code = exc.winerror
-        if isinstance(code, int_types):
+        if isinstance(code, int):
             return code
         # Sometimes, a WindowsError instance has no error code.  An access
         # violation raised by ctypes has only text, for example.  In this
@@ -381,10 +377,6 @@ def run_sta(self):
         messageloop.run()
 
     def run_mta(self):
-        if sys.version_info >= (3, 0):
-            import queue
-        else:
-            import Queue as queue
         self._queue = queue.Queue()
         self._queue.get()
 

comtypes/automation.py

@@ -34,15 +34,6 @@ class _safearray(object):
         tagSAFEARRAY = None
 
 
-if sys.version_info >= (3, 0):
-    int_types = (int,)
-    str_types = (str,)
-    base_text_type = str
-else:
-    int_types = (int, long)
-    str_types = (unicode, str)
-    base_text_type = basestring
-
 LCID = DWORD
 DISPID = LONG
 SCODE = LONG
@@ -262,9 +253,7 @@ def _set_value(self, value):
         if value is None:
             self.vt = VT_NULL
         elif (
-            hasattr(value, "__len__")
-            and len(value) == 0
-            and not isinstance(value, base_text_type)
+            hasattr(value, "__len__") and len(value) == 0 and not isinstance(value, str)
         ):
             self.vt = VT_NULL
         # since bool is a subclass of int, this check must come before
@@ -275,7 +264,7 @@ def _set_value(self, value):
         elif isinstance(value, (int, c_int)):
             self.vt = VT_I4
             self._.VT_I4 = value
-        elif isinstance(value, int_types):
+        elif isinstance(value, int):
             u = self._
             # try VT_I4 first.
             u.VT_I4 = value
@@ -310,7 +299,7 @@ def _set_value(self, value):
         elif isinstance(value, (float, c_double)):
             self.vt = VT_R8
             self._.VT_R8 = value
-        elif isinstance(value, str_types):
+        elif isinstance(value, str):
             self.vt = VT_BSTR
             # do the c_wchar_p auto unicode conversion
             self._.c_void_p = _SysAllocStringLen(value, len(value))
@@ -633,21 +622,11 @@ class IEnumVARIANT(IUnknown):
     def __iter__(self):
         return self
 
-    if sys.version_info >= (3, 0):
-
-        def __next__(self):
-            item, fetched = self.Next(1)
-            if fetched:
-                return item
-            raise StopIteration
-
-    else:
-
-        def next(self):
-            item, fetched = self.Next(1)
-            if fetched:
-                return item
-            raise StopIteration
+    def __next__(self):
+        item, fetched = self.Next(1)
+        if fetched:
+            return item
+        raise StopIteration
 
     def __getitem__(self, index):
         self.Reset()

comtypes/client/_constants.py

@@ -10,11 +10,6 @@
 import comtypes.automation
 import comtypes.typeinfo
 
-if sys.version_info >= (3, 0):
-    base_text_type = str
-else:
-    base_text_type = basestring
-
 
 class _frozen_attr_dict(dict):
     __slots__ = ()
@@ -78,7 +73,7 @@ class Constants(object):
     __slots__ = ("alias", "consts", "enums", "tcomp")
 
     def __init__(self, obj):
-        if isinstance(obj, base_text_type):
+        if isinstance(obj, str):
             tlib = comtypes.typeinfo.LoadTypeLibEx(obj)
         else:
             obj = obj.QueryInterface(comtypes.automation.IDispatch)

comtypes/client/_generate.py

@@ -6,13 +6,7 @@
 import sys
 import types
 from typing import Any, Tuple, List, Optional, Dict, Union as _UnionT
-
-if sys.version_info >= (3, 0):
-    base_text_type = str
-    import winreg
-else:
-    base_text_type = basestring
-    import _winreg as winreg
+import winreg
 
 from comtypes import GUID, typeinfo
 import comtypes.client
@@ -46,7 +40,7 @@ def _resolve_filename(tlib_string, dirpath):
         (abspath, True) or (relpath, False):
             where relpath is an unresolved path.
     """
-    assert isinstance(tlib_string, base_text_type)
+    assert isinstance(tlib_string, str)
     # pathname of type library
     if os.path.isabs(tlib_string):
         # a specific location
@@ -107,7 +101,7 @@ def GetModule(tlib):
     UIAutomation.  The former module contains all the code, the
     latter is a short stub loading the former.
     """
-    if isinstance(tlib, base_text_type):
+    if isinstance(tlib, str):
         tlib_string = tlib
         # if a relative pathname is used, we try to interpret it relative to
         # the directory of the calling module (if not from command line)
@@ -136,8 +130,6 @@ def GetModule(tlib):
     modulename = codegenerator.name_friendly_module(tlib)
     if modulename is None:
         return mod
-    if sys.version_info < (3, 0):
-        modulename = modulename.encode("mbcs")
     # create and import the friendly-named module
     return _create_friendly_module(tlib, modulename)
 
@@ -146,7 +138,7 @@ def _load_tlib(obj):
     # type: (Any) -> typeinfo.ITypeLib
     """Load a pointer of ITypeLib on demand."""
     # obj is a filepath or a ProgID
-    if isinstance(obj, base_text_type):
+    if isinstance(obj, str):
         # in any case, attempt to load and if tlib_string is not valid, then raise
         # as "OSError: [WinError -2147312566] Error loading type library/DLL"
         return typeinfo.LoadTypeLibEx(obj)