How to convert Python string str and json formats to each other

This article mainly introduces the Python string str and json format how to convert each other, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

Foreword:

When str is converted to json format, it is necessary to make sure that the format of the str is consistent with json, that is, the outermost braces on the left are braces and the outermost on the right are braces. If it is inconsistent, it is recommended to split it with regularization to be consistent with the json format

1. Convert import jsonstr ='{"name": "Royal Sister", "age": 18}'j = json.loads (str) print (j) print (type (j)) through json.loads

Internal data in json needs to be surrounded by double quotation marks, not single quotation marks

2.json to str

Using the method of json.dumps, you can convert a json object to a string

Import jsonstr ='{"name": "Royal Sister", "age": 18}'j = json.loads (str) print (j) j = json.dumps (j) print (type (j)) 3. Through eval

The official interpretation of the eval function is that the string str is evaluated as a valid expression and the result is returned.

That is, list,tuple,dict and string can be transformed into each other through eval, for example:

Import jsona = "[[1jue 2], [3je 4]]" b = eval (a) print (type (b)) a = "{1:'a, 2:'b'}" b = eval (a) print (type (b)) a = "([1jue 2], [3jue 4], [5jue 6], (9jue 0))" b = eval (a) print (type (b))

Results:

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