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  • python操作字符串类型json的注意点

    python操作json的方法有
    json.dumps——将json对象(字典)转换为字符串对象
    json.loads——将字符串对象转换为json对象(字典)
    如果定义json对象
    jsonstring1={"results":[{"id":"1","name":"u9ed8u8ba4u5206u7ec4","policy":"4","timer_scan_setting":"{"last":"10.29.13","setting":"fulldisk","type":"day","hour":"13"}"},
    {"id":"2","name":"u6d4bu8bd5u7684","policy":"1","timer_scan_setting":"{"last":"10.29.15","setting":"fulldisk","type":"day","hour":"15"}"},{"id":"4","name":"u4ea7u54c1u7ec4","policy":"3","timer_scan_setting":"{"last":"10.8.15","setting":"disable"}"}]}

    可以直接按json操作,比如

    print jsonstring1.keys()
    print jsonstring1['results'][0]['policy']

    也可以转个360度再操作

    jsonstring1=json.dumps(jsonstring1)
    jsonstring1=json.loads(jsonstring1)
    print jsonstring1.keys()
    print jsonstring1['results'][0]['policy']

    但是如果定义字符串对象就要小心了
    jsonstring2='''{"results":[{"id":"1","name":"u9ed8u8ba4u5206u7ec4","policy":"4","timer_scan_setting":"{"last":"10.29.13","setting":"fulldisk","type":"day","hour":"13"}"},
    {"id":"2","name":"u6d4bu8bd5u7684","policy":"1","timer_scan_setting":"{"last":"10.29.15","setting":"fulldisk","type":"day","hour":"15"}"},{"id":"4","name":"u4ea7u54c1u7ec4","policy":"3","timer_scan_setting":"{"last":"10.8.15","setting":"disable"}"}]}'''

    这个只是对上面的json对象加了三引号转为一个字符串,所以理论上可以直接loads之后就按json操作

    json.loads(jsonstring2)

    但是实际却报错了,原因是因为大括号前后的双引号没有去掉,网上很多在线的json格式化工具对于这些双引号不会报错,但是python会,而定义json对象时加了双引号操作却没报错,是因为不加里面的内容会被转义,所以千万不能完全相信网上的json格式校验工具。

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  • 原文地址:https://www.cnblogs.com/idbeta/p/5233887.html
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