Python字典方法

Python Dictionary就像一个地图，用于以键：值对的形式存储数据。 Python提供了各种内置函数来处理字典。在本文中，我们将看到Python提供的用于处理字典的所有函数的列表。

访问字典

以下函数可用于访问字典项（键和值）。

• get()：该函数返回给定键的值
• keys()：该函数返回一个视图对象，该对象按插入顺序显示字典中所有键的列表
• values()：此函数返回给定字典中所有可用值的列表
• items()：此函数返回包含所有字典键和值的列表

示例：访问字典项目。

Python3

# Python program to demonstrate working
# of dictionary copy
dic = {1:'geeks', 2:'for', 3:'geeks'}
print('original: ', dic)
 
# Accessing value for key
print(dic.get(1))
 
# Accessing keys for the dictionary
print(dic.keys())
 
# Accessing keys for the dictionary
print(dic.values())
 
# Printing all the items of the Dictionary
print(dic.items())

输出

original:  {1: 'geeks', 2: 'for', 3: 'geeks'}
geeks
dict_keys([1, 2, 3])
dict_values(['geeks', 'for', 'geeks'])
dict_items([(1, 'geeks'), (2, 'for'), (3, 'geeks')])

Python字典方法表

Functions Name	Description
clear()	Removes all items from the dictionary
copy()	Returns a shallow copy of the dictionary
fromkeys()	Creates a dictionary from the given sequence
get()	Returns the value for the given key
items()	Return the list with all dictionary keys with values
keys()	Returns a view object that displays a list of all the keys in the dictionary in order of insertion
pop()	Returns and removes the element with the given key
popitem()	Returns and removes the key-value pair from the dictionary
setdefault()	Returns the value of a key if the key is in the dictionary else inserts the key with a value to the dictionary
update()	Updates the dictionary with the elements from another dictionary
values()	Returns a list of all the values available in a given dictionary

注意：有关Python词典的更多信息，请参阅Python词典教程。