Python and JSON data are converted to each other, repr and eval () use

Python Data Conversion JSON

Import JSON  # Imports JSON package data = [    {        "id": 1,        "username": "Zhangshan",        "password": "123qwe",        "lock ": True    },    {        " id ": 2,        " username ":" Lisi ",        " password ":" 123qwe ",        " lock ": true    },    {        "id": 3,        "username": "Wangwu",        "password": "123qwe",        "lock": False    }]jsonstr = Json.dumps (data) # JSON data print (JSONSTR) # python data print (' Raw data string: ', repr (JSONSTR))

　　

Convert JSON to Pathon data

Pystr = Json.loads (jsonstr) print (PYSTR)

Repr and eval usage

Repr (object)  # Converts an object to a string, like Java's ToString () eval (str)  # Converts a repr () converted string into an object　　

JSON Read and write

# Write JSON data with open (' Data1.json ', ' W ') as F:    json.dump (data, f) # Read data with open (' Data1.json ', ' R ') as F:    data = j Son.load (f)

Summarize:

Data conversion

First step: Introducing the JSON package: Import JSON

Step Two: Use Json.dumps (pythonobj) to convert Python data to JSON data

Step Three: Use Json.loads (jsonobj) to convert JSON data to Python data

File Write read

Write using Dump

Read with load

　　　

Python and JSON data are converted to each other, repr and eval () use