Python字典的基础知识已经在下面的文章中讨论过了
null
本文讨论了一些字典方法。
1.str(dic) :-此方法用于 返回字符串 ,表示所有字典键及其值。
2.项目() :-此方法用于 返回列表 所有带值的字典键。
# Python code to demonstrate working of # str() and items() # Initializing dictionary dic = { 'Name' : 'Nandini' , 'Age' : 19 } # using str() to display dic as string print ( "The constituents of dictionary as string are : " ) print ( str (dic)) # using str() to display dic as list print ( "The constituents of dictionary as list are : " ) print (dic.items()) |
输出:
The constituents of dictionary as string are : {'Name': 'Nandini', 'Age': 19} The constituents of dictionary as list are : dict_items([('Name', 'Nandini'), ('Age', 19)])
3.len() :-它返回 关键实体的计数 字典中的元素。
4.类型() :-这个功能 返回数据类型 这是争论的焦点。
# Python code to demonstrate working of # len() and type() # Initializing dictionary dic = { 'Name' : 'Nandini' , 'Age' : 19 , 'ID' : 2541997 } # Initializing list li = [ 1 , 3 , 5 , 6 ] # using len() to display dic size print ( "The size of dic is : " ,end = "") print ( len (dic)) # using type() to display data type print ( "The data type of dic is : " ,end = "") print ( type (dic)) # using type() to display data type print ( "The data type of li is : " ,end = "") print ( type (li)) |
输出:
The size of dic is : 3 The data type of dic is : The data type of li is :
5.复印件 :-此函数创建 这本词典的浅显版本 输入另一本字典。
6.明确 :-此函数用于 清理字典 目录
# Python code to demonstrate working of # clear() and copy() # Initializing dictionary dic1 = { 'Name' : 'Nandini' , 'Age' : 19 } # Initializing dictionary dic3 = {} # using copy() to make shallow copy of dictionary dic3 = dic1.copy() # printing new dictionary print ( "The new copied dictionary is : " ) print (dic3.items()) # clearing the dictionary dic1.clear() # printing cleared dictionary print ( "The contents of deleted dictionary is : " ,end = "") print (dic1.items()) |
输出:
The new copied dictionary is : dict_items([('Age', 19), ('Name', 'Nandini')]) The contents of deleted dictionary is : dict_items([])
本文由 曼吉星 .如果你喜欢GeekSforgek,并想贡献自己的力量,你也可以使用 写极客。组织 或者把你的文章寄去评论-team@geeksforgeeks.org.看到你的文章出现在Geeksforgeks主页上,并帮助其他极客。
如果您发现任何不正确的地方,或者您想分享有关上述主题的更多信息,请写下评论。
© 版权声明
文章版权归作者所有,未经允许请勿转载。
THE END