A dictionary in Python

A dictionary in Python is a key-value data type

Features of the dictionary:

1. Disorderly

2. Key must be unique, so, the dictionary is born to go heavy

Grammar:

Increase

Modify

Delete

Find

Multi-level dictionary nesting and manipulation

Other uses of dictionaries

#setdefault方法 "If key does not exist in the dictionary, the value of key is the set value, and if key is present in the dictionary, the value of key does not change"

#items方法 Convert the Key:value key value in a dictionary to a tuple

#fromkeys方法

#update

Cyclic dict

A dictionary in Python