python2和python3，版本兼容

た入场券 2021-07-26 21:52 569阅读 0赞

# -*- coding: utf-8 -*-
    
    """ 兼容Python版本 """
    
    import sys
    
    is_py2 = (sys.version_info[0] == 2)
    is_py3 = (sys.version_info[0] == 3)
    is_py33 = (sys.version_info[0] == 3 and sys.version_info[1] == 3)
    
    
    try:
        import simplejson as json
    except (ImportError, SyntaxError):
        import json
    
    
    if is_py2:
        from urllib import quote as urlquote, unquote as urlunquote
        from urlparse import urlparse
    
    
        def to_bytes(data):
            """若输入为unicode， 则转为utf-8编码的bytes；其他则原样返回。"""
            if isinstance(data, unicode):
                return data.encode('utf-8')
            else:
                return data
    
        def to_string(data):
            """把输入转换为str对象"""
            return to_bytes(data)
    
        def to_unicode(data):
            """把输入转换为unicode，要求输入是unicode或者utf-8编码的bytes。"""
            if isinstance(data, bytes):
                return data.decode('utf-8')
            else:
                return data
    
        def stringify(input):
            if isinstance(input, dict):
                return dict([(stringify(key), stringify(value)) for key,value in input.iteritems()])
            elif isinstance(input, list):
                return [stringify(element) for element in input]
            elif isinstance(input, unicode):
                return input.encode('utf-8')
            else:
                return input
    
        builtin_str = str
        bytes = str
        str = unicode
    
    
    elif is_py3:
        from urllib.parse import quote as urlquote, unquote as urlunquote
        from urllib.parse import urlparse
    
        def to_bytes(data):
            """若输入为str（即unicode），则转为utf-8编码的bytes；其他则原样返回"""
            if isinstance(data, str):
                return data.encode(encoding='utf-8')
            else:
                return data
    
        def to_string(data):
            """若输入为bytes，则认为是utf-8编码，并返回str"""
            if isinstance(data, bytes):
                return data.decode('utf-8')
            else:
                return data
    
        def to_unicode(data):
            """把输入转换为unicode，要求输入是unicode或者utf-8编码的bytes。"""
            return to_string(data)
    
        def stringify(input):
            return input
    
        builtin_str = str
        bytes = bytes
        str = str