Notes for string type json operations in python

There are methods for python to operate json

json.dumps -- converts the json object (dictionary) to a string object

json.loads -- converts a string object to an json object (dictionary)

If you define an json object

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\"}"}]}

You can directly press json, for example

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

You can turn it 360 degrees

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

But be careful if you define a string object

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\"}"}]}'''

This just puts 3 quotes around the json object above to make it a string, so in theory you can just use json after loads

json.loads(jsonstring2)

But the actual error, because big bracket without removing the quotes, online many online json formatting tools for the double quotation marks will not complain, but python, defined json object add double quotation marks when the operation is not an error, because Gary the content will not be escaped, so don't be totally believe online json format calibration tool.

conclusion