What should a JSON look like? How does Python use JSON?

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I have nothing to do. Let's learn how to use it with you json~

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First , One json What does it look like ？

See resources , It should look like the bottom ：

{

"name": "dabao",
"id":123,
"hobby": {

"sport": "basketball",
"book": "python study"
}
}

Does the subject look like Python My dictionary is very much like ！

Yes , When you read python In the time , It's just a dictionary .

Dictionary value Yes, it can be completely determined by the user , It can be int, It can be float, It can also be str Or a list .

Read json The operation is as follows ：

（ Be careful ：json It is to be read in the way of reading text ！ This reveals the essence ,json It's essentially a formatted text file ！ It often consists of utf-8 code , Not binary ）

import json
with open(' route ','r', encoding='utf8') as fp:
json_data = json.load(fp)
print(' This is the... In the file json data ：',json_data)
print(' This is the data type that reads the file data ：', type(json_data))

（ The code here may also be GB code ？）
What comes in is a dictionary .

How to write into json file ？

python Learning exchange group ：660193417###
import json
a = {

"name": "dabao",
"id":123,
"hobby": {

"sport": "basketball",
"book": "python study"
}
}
b = json.dumps(a)
with open('new_json.json', 'w') as fp:
fp.write(b)

The effect is as follows ：

First, through json.dumps() hold dict Demote to string .

Then write the string to json In file . It's that simple .

Today's knowledge point is like this , I hope it will be helpful to you who are learning by yourself ~

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