mimetypes.py 文件源码

def read_windows_registry(self, strict=True):
        """
        Load the MIME types database from Windows registry.

        If strict is true, information will be added to
        list of standard types, else to the list of non-standard
        types.
        """

        # Windows only
        if not _winreg:
            return

        def enum_types(mimedb):
            i = 0
            while True:
                try:
                    ctype = _winreg.EnumKey(mimedb, i)
                except EnvironmentError:
                    break
                else:
                    yield ctype
                i += 1

        default_encoding = sys.getdefaultencoding()
        with _winreg.OpenKey(_winreg.HKEY_CLASSES_ROOT,
                             r'MIME\Database\Content Type') as mimedb:
            for ctype in enum_types(mimedb):
                try:
                    with _winreg.OpenKey(mimedb, ctype) as key:
                        suffix, datatype = _winreg.QueryValueEx(key,
                                                                'Extension')
                except EnvironmentError:
                    continue
                if datatype != _winreg.REG_SZ:
                    continue
                self.add_type(ctype, suffix, strict)