Python 3中LogonUserW中的访问冲突

下面是一个调用它的最小示例.但是，如果您需要调用多个此类函数，则还可以考虑 [GitHub]:适用于Windows的Python(pywin32)扩展，它是 WINAPI 上的 Python 包装器. code.py :import sysimport ctypesfrom ctypes import wintypesdef main(): advapi32_dll = ctypes.WinDLL("advapi32.dll") logon_user_func = advapi32_dll.LogonUserW logon_user_func.argtypes = [wintypes.LPCWSTR, wintypes.LPCWSTR, wintypes.LPCWSTR, wintypes.DWORD, wintypes.DWORD, wintypes.PHANDLE] logon_user_func.restype = wintypes.BOOL user = "dummy_user" domain = "dummy_domain" pwd = "dummy_pwd" logon_type = 2 provider = 0 handle = wintypes.HANDLE() ret = logon_user_func(user, domain, pwd, logon_type, provider, ctypes.byref(handle)) print("{:s} returned {:}".format(logon_user_func.__name__, "TRUE" if ret else "FALSE"))if __name__ == "__main__": print("Python {:s} on {:s}\n".format(sys.version, sys.platform)) main() 注释:除了argtypes/restypes:在 Python3 中，字符串默认为 ，因此不需要encode() HANDLE通过byref 传递 输出:(py35x64_test) e:\Work\Dev\StackOverflow\q051251086>"e:\Work\Dev\VEnvs\py35x64_test\Scripts\python.exe" code.pyPython 3.5.4 (v3.5.4:3f56838, Aug 8 2017, 02:17:05) [MSC v.1900 64 bit (AMD64)] on win32LogonUserW returned FALSEI am writing a Python3 script for someone, that utilizes the advapi dll and its LogonUserW function via ctypes.When running the codein the __init__ functiondll_location = find_library("advapi32");if (dll_location == None): raise FileNotFoundErroradv_dll = WinDLL(dll_location);#gets the pointer to the functionlogonUser = adv_dll.LogonUserW;self.logonUser = logonUserIn login(username, domain, password) function#Sets the parameters to call the DLLloginType = DWORD(2)loginProvider = DWORD(0)handle = PHANDLE()user = LPCSTR(username.encode());pw = LPCSTR(password.encode());dom = LPCSTR(domain.encode());rescode = self.logonUser(user, dom, pw, loginType, loginProvider, handle);It raises OSError: exception: access violation writing 0x0000000000000000Any idea what could be causing the error and how to fix?PS: Yes I know I am not following PEP 8 for variable names, I am normally a java programmer. 解决方案 According to [Python]: types - A foreign function library for Python, you should set argtypes and restype (this is one way) for the function you're calling ([MS.Docs]: LogonUserW function).Below is a minimal example for calling it. If however, you need to call multiple such functions, you could also consider [GitHub]: Python for Windows (pywin32) Extensions, which is a Python wrapper over WINAPIs.code.py:import sysimport ctypesfrom ctypes import wintypesdef main(): advapi32_dll = ctypes.WinDLL("advapi32.dll") logon_user_func = advapi32_dll.LogonUserW logon_user_func.argtypes = [wintypes.LPCWSTR, wintypes.LPCWSTR, wintypes.LPCWSTR, wintypes.DWORD, wintypes.DWORD, wintypes.PHANDLE] logon_user_func.restype = wintypes.BOOL user = "dummy_user" domain = "dummy_domain" pwd = "dummy_pwd" logon_type = 2 provider = 0 handle = wintypes.HANDLE() ret = logon_user_func(user, domain, pwd, logon_type, provider, ctypes.byref(handle)) print("{:s} returned {:}".format(logon_user_func.__name__, "TRUE" if ret else "FALSE"))if __name__ == "__main__": print("Python {:s} on {:s}\n".format(sys.version, sys.platform)) main()Notes:Besides argtypes / restypes:In Python3 strings are wide by default, so no need for encode()The HANDLE is passed via byrefOutput:(py35x64_test) e:\Work\Dev\StackOverflow\q051251086>"e:\Work\Dev\VEnvs\py35x64_test\Scripts\python.exe" code.pyPython 3.5.4 (v3.5.4:3f56838, Aug 8 2017, 02:17:05) [MSC v.1900 64 bit (AMD64)] on win32LogonUserW returned FALSE 这篇关于Python 3中LogonUserW中的访问冲突的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！