2019-01-25 02:52:40 +08:00
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"""
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编码和解码 - BASE64
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0-9A-Za-z+/
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1100 0101 1001 0011 0111 0110
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00110001 00011001 00001101 00110110
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base64
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b64encode / b64decode
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-------------------------------------
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序列化和反序列化
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序列化 - 将对象变成字节序列(bytes)或者字符序列(str) - 串行化/腌咸菜
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反序列化 - 把字节序列或者字符序列还原成对象
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Python标准库对序列化的支持：
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json - 字符形式的序列化
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pickle - 字节形式的序列化
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dumps / loads
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"""
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import base64
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import json
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import redis
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from example02 import Person
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class PersonJsonEncoder(json.JSONEncoder):
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def default(self, o):
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return o.__dict__
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def main():
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cli = redis.StrictRedis(host='120.77.222.217', port=6379,
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password='123123')
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data = base64.b64decode(cli.get('guido'))
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with open('guido2.jpg', 'wb') as file_stream:
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file_stream.write(data)
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# with open('guido.jpg', 'rb') as file_stream:
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# result = base64.b64encode(file_stream.read())
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# cli.set('guido', result)
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# persons = [
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# Person('骆昊', 39), Person('王大锤', 18),
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# Person('白元芳', 25), Person('狄仁杰', 37)
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# ]
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# persons = json.loads(cli.get('persons'))
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# print(persons)
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# cli.set('persons', json.dumps(persons, cls=PersonJsonEncoder))
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if __name__ == '__main__':
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main()
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