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  • [BUGFIX]__import_pywin32_system_module__

    import_pywin32_system_module

    修复方法:

    编辑 X:/Python27/Lib/site-packages/win32/lib/pywintypes.py 第114行

        if sys.version_info < (3,0):
            pass
            # This is for AssertionError when running BanBanTong project
            # 2015-02-10 MH 将下面两行注释掉
            ## assert sys.modules[modname] is old_mod
            ## assert mod is old_mod
    

    编辑好了的整个文件如下

    # Magic utility that "redirects" to pywintypesxx.dll
    import imp, sys, os
    def __import_pywin32_system_module__(modname, globs):
        # This has been through a number of iterations.  The problem: how to 
        # locate pywintypesXX.dll when it may be in a number of places, and how
        # to avoid ever loading it twice.  This problem is compounded by the
        # fact that the "right" way to do this requires win32api, but this
        # itself requires pywintypesXX.
        # And the killer problem is that someone may have done 'import win32api'
        # before this code is called.  In that case Windows will have already
        # loaded pywintypesXX as part of loading win32api - but by the time
        # we get here, we may locate a different one.  This appears to work, but
        # then starts raising bizarre TypeErrors complaining that something
        # is not a pywintypes type when it clearly is!
    
        # So in what we hope is the last major iteration of this, we now
        # rely on a _win32sysloader module, implemented in C but not relying
        # on pywintypesXX.dll.  It then can check if the DLL we are looking for
        # lib is already loaded.
        if not sys.platform.startswith("win32"):
            # These extensions can be built on Linux via the 'mainwin' toolkit.
            # Look for a native 'lib{modname}.so'
            # NOTE: The _win32sysloader module will probably build in this
            # environment, so it may be better to use that here too.
            for ext, mode, ext_type in imp.get_suffixes():
                if ext_type==imp.C_EXTENSION:
                    for path in sys.path:
                        look = os.path.join(path, "lib" + modname + ext)
                        if os.path.isfile(look):
                            mod = imp.load_module(modname, None, look,
                                                  (ext, mode, ext_type))
                            # and fill our namespace with it.
                            # XXX - if this ever moves to py3k, this will probably
                            # need similar adjustments as below...
                            globs.update(mod.__dict__)
                            return
            raise ImportError("No dynamic module " + modname)
        # See if this is a debug build.
        for suffix_item in imp.get_suffixes():
            if suffix_item[0]=='_d.pyd':
                suffix = '_d'
                break
        else:
            suffix = ""
        filename = "%s%d%d%s.dll" % 
                   (modname, sys.version_info[0], sys.version_info[1], suffix)
        if hasattr(sys, "frozen"):
            # If we are running from a frozen program (py2exe, McMillan, freeze)
            # then we try and load the DLL from our sys.path
            # XXX - This path may also benefit from _win32sysloader?  However,
            # MarkH has never seen the DLL load problem with py2exe programs...
            for look in sys.path:
                # If the sys.path entry is a (presumably) .zip file, use the
                # directory 
                if os.path.isfile(look):
                    look = os.path.dirname(look)            
                found = os.path.join(look, filename)
                if os.path.isfile(found):
                    break
            else:
                raise ImportError("Module '%s' isn't in frozen sys.path %s" % (modname, sys.path))
        else:
            # First see if it already in our process - if so, we must use that.
            import _win32sysloader
            found = _win32sysloader.GetModuleFilename(filename)
            if found is None:
                # We ask Windows to load it next.  This is in an attempt to 
                # get the exact same module loaded should pywintypes be imported
                # first (which is how we are here) or if, eg, win32api was imported
                # first thereby implicitly loading the DLL.
    
                # Sadly though, it doesn't quite work - if pywintypesxx.dll
                # is in system32 *and* the executable's directory, on XP SP2, an
                # import of win32api will cause Windows to load pywintypes
                # from system32, where LoadLibrary for that name will
                # load the one in the exe's dir.
                # That shouldn't really matter though, so long as we only ever
                # get one loaded.
                found = _win32sysloader.LoadModule(filename)
            if found is None:
                # Windows can't find it - which although isn't relevent here, 
                # means that we *must* be the first win32 import, as an attempt
                # to import win32api etc would fail when Windows attempts to 
                # locate the DLL.
                # This is most likely to happen for "non-admin" installs, where
                # we can't put the files anywhere else on the global path.
    
                # If there is a version in our Python directory, use that
                if os.path.isfile(os.path.join(sys.prefix, filename)):
                    found = os.path.join(sys.prefix, filename)
            if found is None:
                # Not in the Python directory?  Maybe we were installed via
                # easy_install...
                if os.path.isfile(os.path.join(os.path.dirname(__file__), filename)):
                    found = os.path.join(os.path.dirname(__file__), filename)
            if found is None:
                # give up in disgust.
                raise ImportError("No system module '%s' (%s)" % (modname, filename))
        # py2k and py3k differences:
        # On py2k, after doing "imp.load_module('pywintypes')", sys.modules
        # is unchanged - ie, sys.modules['pywintypes'] still refers to *this*
        # .py module - but the module's __dict__ has *already* need updated
        # with the new module's contents.
        # However, on py3k, sys.modules *is* changed - sys.modules['pywintypes']
        # will be changed to the new module object.
        # SO: * on py2k don't need to update any globals.
        #     * on py3k we update our module dict with the new module's dict and
        #       copy its globals to ours.
        old_mod = sys.modules[modname]
        # Python can load the module
        mod = imp.load_dynamic(modname, found)
        # Check the sys.modules[] behaviour we describe above is true...
        if sys.version_info < (3,0):
            pass
            # This is for AssertionError when running BanBanTong project
            # 2015-02-10 MH
            ## assert sys.modules[modname] is old_mod
            ## assert mod is old_mod
        else:
            assert sys.modules[modname] is not old_mod
            assert sys.modules[modname] is mod
            # as above - re-reset to the *old* module object then update globs.
            sys.modules[modname] = old_mod
            globs.update(mod.__dict__)
    
    
    __import_pywin32_system_module__("pywintypes", globals())
    
    
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  • 原文地址:https://www.cnblogs.com/MrWho/p/bugfix-import_pywin32_system_module.html
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