introduction and use of json

A, JSON Introduction

Full name (JavaScript Object Notation), JS objects manifestations

In ajax allowed to build complex formatting the response data to JSON format further responsive to the output.

Two, JSON performance

1. JSON representation of a single object

   1. {} Represents a single object using

   2. Use key in {}: value is represented in the form of attributes (data)

   3. Key must be used '' in quotes

   4. value

      python	json
      str	String
      int，float	numebr
      True，False	true，false
      None	null
      list，tuple	array
      Dec	object

2. JSON represents an array (a set of objects)

   1. Use [] represents an array

   2. Allowing the array comprising a plurality of string or JSON object

      var arr = ["str",{object}];

Third, the different files and JSON string conversion

	python	js	flask
JSON --> string	json.dumps	JSON.stringify
string --> JSON	json.loads	JSON.parse	jsonify

Fourth, the transmission requirements

• The front end transmission json:
  request header 'Content-Type', 'application / json'
• Get the rear end:
  request.get_json [ 'Key']