Python basic data type--list

First, create a list:

Li = []li = List () name_list = [' Alex ', ' Seven ', ' eric ']name_list = List ([' Alex ', ' Seven ', ' Eric '])

Second, the basic operation:

#append追加name_list = ["Zhangyanlin", "suoning", "Nick"]name_list.append (' Zhang ') print (name_list) #count制定字符出现几次name _list = ["Zhangyanlin", "suoning", "Nick"]name_list.append (' Zhang ') name_list.append (' Zhang ') name_list.append (' Zhang ') print (Name_list.count (' Zhang ')) #extend可扩展, bulk to riga data name_list = ["Zhangyanlin", "suoning", "nick"]name = ["Aylin "," Zhang "," Yan "," Lin "]name_list.extend (name) print (name_list) #index找到字符所在的位置name_list = [" Zhangyanlin "," suoning ", "Nick"]print (' Nick ') #insert插入, inserting values into the index name_list = ["Zhangyanlin", "suoning", "Nick"]name_ List.insert (1, "Zhang") print (name_list) #pop在原列表中移除掉最后一个元素 and assign to another variable name_list = ["Zhangyanlin", "suoning", "Nick"] Name = Name_list.pop () print (name) #remove移除, only remove the first name_list found from the left = ["Zhangyanlin", "suoning", "Nick"]name_ List.remove (' Nick ') print (name_list) #reverse反转name_list = ["Zhangyanlin", "suoning", "Nick"]name_list.reverse () Print (name_list) #del删除其中元素, remove name_list from 1 to 3 = ["Zhangyanlin", "suoning", "Nick"]del Name_list[1:3]print (name_list)

#join将列表元素用指定字符串连接name_list = ["You", "is", "good"]s = "". Join (name_list) print (name_list)

List source

Iii. data type conversion string to list

s = "Hello Morra" li = List (s) print (LI) output:[' You ', ' good ', ' m ', ' o ', ' R ', ' R ', ' a ']

Tuple goto List

Tu = ("Hello", "alex") Li = List (tu) print (li) output:[' hello ', ' Alex ']

Dictionary goto List

DiC = {' K1 ': ' Hello ', ' K2 ': ' Morra '}l3 = List (dic)              #字典在循环的时候默认只循环keyprint (L3) L4 = List (Dic.values ()) print (l4) L5 = List (Dic.items ()) print (L5) output:[' K2 ', ' K1 ' [' Morra ', ' Hello '] [(' K2 ', ' Morra '), (' K1 ', ' hello ')]

Iv. Possible iterative

L = [' I ', ' am ', ' spark ']# can be iterated by for loop for I in L:    print (i) # I am spark

Five, can be nested

Li = [' String ', (' tuple ', ' hh '), {"Key1": "Value1", "Key2": "value2"}]print (li[2]["Key1"]) #输出  value1

Python basic data type--list