python中字符串类型json操作的注意事项

2019-11-25 16:12:33

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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":"/u9ed8/u8ba4/u5206/u7ec4","policy":"4","timer_scan_setting":"{/"last/":/"10.29.13/",/"setting/":/"fulldisk/",/"type/":/"day/",/"hour/":/"13/"}"},{"id":"2","name":"/u6d4b/u8bd5/u7684","policy":"1","timer_scan_setting":"{/"last/":/"10.29.15/",/"setting/":/"fulldisk/",/"type/":/"day/",/"hour/":/"15/"}"},{"id":"4","name":"/u4ea7/u54c1/u7ec4","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":"/u9ed8/u8ba4/u5206/u7ec4","policy":"4","timer_scan_setting":"{/"last/":/"10.29.13/",/"setting/":/"fulldisk/",/"type/":/"day/",/"hour/":/"13/"}"},{"id":"2","name":"/u6d4b/u8bd5/u7684","policy":"1","timer_scan_setting":"{/"last/":/"10.29.15/",/"setting/":/"fulldisk/",/"type/":/"day/",/"hour/":/"15/"}"},{"id":"4","name":"/u4ea7/u54c1/u7ec4","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