1006- Python 字典(Dictionary)

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本文详细介绍了Python字典的基础操作，包括如何创建、修改字典，以及如何对字典内的数据进行排序等实用技巧。

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Python 字典的一些操作

字典基础

字典是另一种可变容器模型，且可存储任意类型对象。

字典的每个键值(key=>value)对用冒号(:)分割，每个对之间用逗号(,)分割，整个字典包括在花括号({})中 ,格式如下所示：

d = {key1 : value1, key2 : value2 }
dict = {‘Alice’: ‘2341’, ‘Beth’: ‘9102’, ‘Cecil’: ‘3258’}

Markdown及扩展

代码块

inventory = {
    'gold' : 500,
    'pouch' : ['flint', 'twine', 'gemstone'], # Assigned a new list to 'pouch' key
    'backpack' : ['xylophone','dagger', 'bedroll','bread loaf']
}

# Adding a key 'burlap bag' and assigning a list to it
inventory['burlap bag'] = ['apple', 'small ruby', 'three-toed sloth']

# Sorting the list found under the key 'pouch'
inventory['pouch'].sort() 

# Your code here
inventory['pocket']=['seashell','strange berry','lint']
inventory['backpack'].sort() 
inventory['backpack'].remove('dagger') 
inventory['gold'] += 50

 Instructions

    01.Add a key to inventory called 'pocket'
    02.Set the value of 'pocket' to be a list consisting of the strings 'seashell', 'strange berry', and 'lint'
    03..sort() the items in the list stored under the 'backpack' key
    04.Then .remove('dagger') from the list of items stored under the 'backpack' key
    05.Add 50 to the number stored under the 'gold' key