Python's JSON method

JSON Introduction:JSON, full name JavaScript Object Notation, is a lightweight data interchange format. The most extensive application of Json is the data format for the communication of Web servers and clients in AJAX . It is also often used in HTTP requests, so it is natural to learn a variety of json .

Dumps method

Converting a dictionary data type to a JSON string type

Example:

Import JSON

m = {' A ': 123, ' B ': ' Hahaha '}

Json_str = Json.dumps (M)

Print (JSON_STR)

Print (Type (JSON_STR))

Output:

{"A": 123, "B": "Hahaha"}

<class ' str ' >

Python format corresponds to JSON format

Python JSON

Dict Object

list, tuple array

STR, Unicode string

int, long, float number

True True

False False

None NULL

Loads method to convert the JSON format to Python format

Example:

Import JSON

Jsondata = ' {' A ': 1, ' B ': 2, ' C ': 3} '

Dict1 = Json.loads (jsondata)

Print (DICT1)

Print (Type (DICT1))

Output:

{' B ': 2, ' a ': 1, ' C ': 3}

<class ' Dict ' >

Dump method that writes data of the Python data type to the file in JSON format

Example:

Import JSON

Jsondata = ' {' A ': 1, ' B ': 2, ' C ': 3, ' d ': 4, ' E ': 5} '

With open (' A.txt ', ' W ') as F:

Json.dump (JSONDATA,F)

Output:

Write content in the A.txt file

The Load method, which converts the file contents of the JSON type to the Python data format read

Example:

Import JSON

Jsondata = ' {' A ': 1, ' B ': 2, ' C ': 3, ' d ': 4, ' E ': 5} '

With open (' A.txt ', ' W ') as F:

Json.dump (JSONDATA,F)

With open (' A.txt ', ' R ') as FF:

Dict1=json.load (FF)

Print (DICT1)

Print (Type (DICT1))

Output:

{"A": 1, "B": 2, "C": 3, "D": 4, "E": 5}

<class ' str ' >

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Python's JSON method