问题描述
每当我导入pywinauto时，我都会遇到以下错误"追溯(最近一次通话):WINFUNCTYPE中的第123行的文件"D:\ Python \ Python38 \ lib \ ctypes_init_.py"返回_win_functype_cache [(restype，argtypes，标志)]KeyError:(，(，，，)，0)
Whenever I import pywinauto I am getting below error"Traceback (most recent call last):File "D:\Python\Python38\lib\ctypes_init_.py", line 123, in WINFUNCTYPEreturn _win_functype_cache[(restype, argtypes, flags)]KeyError: (, (, , ), 0)
在处理上述异常期间，发生了另一个异常:
During handling of the above exception, another exception occurred:
回溯(最近通话最近):在第3行中输入文件"C:/Users/tejaw/PycharmProjects/xxxxxxxx/Sample.py"导入pywinauto文件"D:\ Python \ Python38 \ lib \ site-packages \ pywinauto_init_.py"，第89行，在从 .导入findwindows文件"D:\ Python \ Python38 \ lib \ site-packages \ pywinauto \ findwindows.py"，第42行，在从 .进口管制文件"D:\ Python \ Python38 \ lib \ site-packages \ pywinauto \ controls_init_.py"，第36行，在从 .导入uiawrapper#在后端注册"uia"(在uiawrapper模块的末尾)文件"D:\ Python \ Python38 \ lib \ site-packages \ pywinauto \ controls \ uiawrapper.py"，第47行，在从..uia_defines导入IUIA文件"D:\ Python \ Python38 \ lib \ site-packages \ pywinauto \ uia_defines.py"，第181行，位于pattern_ids = _build_pattern_ids_dic()_build_pattern_ids_dic中的第169行的文件"D:\ Python \ Python38 \ lib \ site-packages \ pywinauto \ uia_defines.py"如果hasattr(IUIA().ui_automation_client，cls_name):通话中第50行的文件"D:\ Python \ Python38 \ lib \ site-packages \ pywinauto \ uia_defines.py"cls._instances [cls] =超级(_Singleton，cls).call(* args，** kwargs)初始化文件"D:\ Python \ Python38 \ lib \ site-packages \ pywinauto \ uia_defines.py"，第60行self.UIA_dll = comtypes.client.GetModule('UIAutomationCore.dll')GetModule中的第110行的文件"D:\ Python \ Python38 \ lib \ site-packages \ comtypes \ client_generate.py"mod = _CreateWrapper(tlib，路径名)_CreateWrapper中的第184行的文件"D:\ Python \ Python38 \ lib \ site-packages \ comtypes \ client_generate.py"mod = _my_import(全名)在my_import中的文件"D:\ Python \ Python38 \ lib \ site-packages \ comtypes \ client_generate.py"，第24行返回import(全名，globals()，locals()，['DUMMY'])第1931行的文件"D:\ Python \ Python38 \ lib \ site-packages \ comtypes \ gen_944DE083_8FB8_45CF_BCB7_C477ACB2F897_0_1_0.py"IUIAutomation.methods = [setattr中的文件"D:\ Python \ Python38 \ lib \ site-packages \ comtypes_init.py"，第329行self.make_methods(值)在make_methods中的行698中的文件"D:\ Python \ Python38 \ lib \ site-packages \ comtypes_init.py"原型= WINFUNCTYPE(restype，* argtypes)WINFUNCTYPE中的文件"D:\ Python \ Python38 \ lib \ ctypes_init.py"，第125行WinFunctionType(_CFuncPtr)类:TypeError:argtypes中的第2项按值传递并集，该值不受支持."
Traceback (most recent call last):File "C:/Users/tejaw/PycharmProjects/xxxxxxxx/Sample.py", line 3, inimport pywinautoFile "D:\Python\Python38\lib\site-packages\pywinauto_init_.py", line 89, infrom . import findwindowsFile "D:\Python\Python38\lib\site-packages\pywinauto\findwindows.py", line 42, infrom . import controlsFile "D:\Python\Python38\lib\site-packages\pywinauto\controls_init_.py", line 36, infrom . import uiawrapper # register "uia" back-end (at the end of uiawrapper module)File "D:\Python\Python38\lib\site-packages\pywinauto\controls\uiawrapper.py", line 47, infrom ..uia_defines import IUIAFile "D:\Python\Python38\lib\site-packages\pywinauto\uia_defines.py", line 181, inpattern_ids = _build_pattern_ids_dic()File "D:\Python\Python38\lib\site-packages\pywinauto\uia_defines.py", line 169, in _build_pattern_ids_dicif hasattr(IUIA().ui_automation_client, cls_name):File "D:\Python\Python38\lib\site-packages\pywinauto\uia_defines.py", line 50, in callcls._instances[cls] = super(_Singleton, cls).call(*args, **kwargs)File "D:\Python\Python38\lib\site-packages\pywinauto\uia_defines.py", line 60, in initself.UIA_dll = comtypes.client.GetModule('UIAutomationCore.dll')File "D:\Python\Python38\lib\site-packages\comtypes\client_generate.py", line 110, in GetModulemod = _CreateWrapper(tlib, pathname)File "D:\Python\Python38\lib\site-packages\comtypes\client_generate.py", line 184, in _CreateWrappermod = _my_import(fullname)File "D:\Python\Python38\lib\site-packages\comtypes\client_generate.py", line 24, in my_importreturn import(fullname, globals(), locals(), ['DUMMY'])File "D:\Python\Python38\lib\site-packages\comtypes\gen_944DE083_8FB8_45CF_BCB7_C477ACB2F897_0_1_0.py", line 1931, inIUIAutomation.methods = [File "D:\Python\Python38\lib\site-packages\comtypes_init.py", line 329, in setattrself.make_methods(value)File "D:\Python\Python38\lib\site-packages\comtypes_init.py", line 698, in make_methodsprototype = WINFUNCTYPE(restype, *argtypes)File "D:\Python\Python38\lib\ctypes_init.py", line 125, in WINFUNCTYPEclass WinFunctionType(_CFuncPtr):TypeError: item 2 in argtypes passes a union by value, which is unsupported."
请帮助我.
推荐答案
这是Python 2.7.6和3.8.1中的Python错误.请重新安装Python 3.7.7+或3.8.2 +.
This is Python bug in Python 2.7.6 and 3.8.1. Please do clean install of Python 3.7.7+ or 3.8.2+.
此问题的完整历史记录在这里: https://github.com/pywinauto/pywinauto/issues/868
Full history of the issue is here: https://github.com/pywinauto/pywinauto/issues/868
这是libffi中缺少的用于按值传递并集的功能.ctypes使用libffi在运行时解析调用约定.由于缺少功能，Python Core开发人员决定禁止此选项.但是，错误的决定破坏了Windows上的许多用户.因此，错误的补丁已在Python 3.7.7/3.8.2中恢复.
This is a missing feature in libffi for passing union by value. libffi is used by ctypes for resolving calling convention at runtime. Python Core developers decided to prohibit this option due to missing feature. But it was wrong decision that broke a lot of users on Windows. So the wrong patch was reverted in Python 3.7.7 / 3.8.2.
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