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I. What is JSON1. JSON is the abbreviation for JavaScript Object notation, which is a data interchange format2. Essence is a string, is the string representation of the JS object3. Similar to the dictionary in Python, but there are some grammatical differences
No value of None, only null value
Encoding format for Utf-8
The string must be double-quoted to express the
4. The string in
This article describes how to use the modifier @ property to convert a method into a feature instance in python, interested friends can refer to this article for details about how to use the python decorator @ property to turn the method into a feature instance. interested friends can refer
#-*-Coding: UTF-8-*-"Created on Sun Nov 13 23:19:03 2016 @ author: tob
= simplejsondumps (data)
Traceback (most recent call last):
File "
Loads function: Convert JSON-encoded strings to Python data structures
>>> mes = simplejson.load (j_str)
Traceback (most recent call last):
File "
1 # Dump function
2 # Converts data to a string that is known to all program languages in a special form and writes file
3 with open (' D:/tm
The Dict (or object) of Python and the conversion of JSON to each otherIn the Python language, the conversion between JSON data and dict dictionaries and objects is an essential operation.Bring your own JSON library in Python. by
The Dict (or object) of Python and the conversion of JSON to each otherIn the Python language, the conversion between JSON data and dict dictionaries and objects is an essential operation.Bring your own JSON library in Python. by
In Python, serialization can be interpreted as converting the encoded format of an object in Python to a string in JSON (pickle) format, which can be interpreted as converting a string in JSON (pickle) format into an encoded format for an object in PythonTo give a simple example, we write the
I. Use of file JSONJSON introduction: JSON Full name JavaScripts object Notation, is a lightweight data interchange format, the most extensive application of JSON as a Web server and client communication in AIAX data format, is now also used in httpd requests, So the various learning of JSON is a natural thing. The following are the two most common ways of workin
This article mainly introduced the writing Python script to convert the SQLAlchemy object to the Dict tutorial, mainly based on the Python model class constructs a transformation method, needs the friend to be possible to refer to under
When using SQLAlchemy to write Web applications, often use JSON to communicate, wi
Python has its own module for handling python, which can be directly import JSON when used.
Using the loads method, you can convert a JSON string into a Python object, as follows:JSON Python
JSON (JavaScript Object Notation) is a lightweight data interchange format. JSON is the use of strings to represent JavaScript objects;A JSON string is a representation of a JS object (in the form of a string)Both Python and other languages have their own data types, but if you want to work with
than XML
Case 1: Double quotation marks (such as li = ["a", "B"]) must be used when strings are involved in the dumps and loads json conversion process. instead of li = ['A', 'B']
Import jsonDic = {"k1": "v1", "k2": "v2 "}Print ('dic ', dic, type (dic ))Result = json. dumps (dic) # convert the basic python data type
load converts the file open from the string to the data type
Json can exchange data between different languages, while pickle is only used between python. Json can only serialize the most basic data types. josn can only serialize common data types, such as list, dictionary, list, string, number, and object type! Josn won't work. Pickle can serialize all data typ
# from Urllib Import request## F=request.urlopen ("http://123.178.101.29:81/xs_main.aspx?xh=201512102028")## RESULT=STR (F.read (), encoding= ' gb2312 ')# Print (Result)#json. Loads used to convert a dictionary, a list, a tuple form string, to a corresponding amount dictionary, a list, a tuple#利用json把字符串变成字典# s= ' {"name": "Guo", "Age": 18} '# import
Unicode objects into other encoded strings, Str.encode (' utf-8 '), encoded as UTF-8, and (2) decode to convert other encoded strings into Unicode encoding, Str.decode (' UTF-8 ');
Import Chardet Check the specific encoding type, chardet.detect(str) but Str cannot be a Unicode encoding type, but the method does not accept encoded parameters that are already Unicode , there will be typeerror:expected Object of type bytes or ByteArray, got:
JSON processing:JSON is a data type that is common in all languages, like a dictionary in Python, and JSON is used with JSON modules, which have the following common methods: Key-valueImport JSON: #dump/dumps Usage: both of the same points are translated into
Unicode objects into other encoded strings, Str.encode (' utf-8 '), encoded as UTF-8, and (2) decode to convert other encoded strings into Unicode encoding, Str.decode (' UTF-8 ');
Import Chardet Check the specific encoding type, chardet.detect(str) but Str cannot be a Unicode encoding type, but the method does not accept encoded parameters that are already Unicode , there will be typeerror:expected Object of type bytes or ByteArray, got:
A
the Data Type
Json can exchange data between different languages, while pickle is only used between python. Json can only serialize the most basic data types. josn can only serialize common data types, such as list, Dictionary, list, String, number, and object type! Josn won't work. Pickle can serialize all data types, including classes and functions.
Example:
;>J_str7 '["aa", "bb", "cc"]'1 #loads function2 #convert a json-encoded string into a python data structure3>>>J_str4 '["aa", "bb", "cc"]'5>>> mes =json.loads (j_str)6>>>mes7['AA','BB','cc'] 1 # 2 # Converts data into a string that is recognized by all programming languages in a special form and writes to the file 3 with open ( d:/tmp.json ", " w )
One, Jsonjson:javascript object Notation (JavaScript object notation) JSON is the syntax for storing and exchanging textual information 1, JSON Lightweight: Syntax rules JSON syntax is a subset of JavaScript object notation syntax. (1) data in name/value pairs (2) data is separated by commas (3) A curly brace represents an object (4) [] array, can hold multiple o
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