list类型功能剖析

append 向后追加

1 name_list=["eirc","alex","tony"]
2 name_list.append('seven')
3 print(name_list)
4 #输出结果['eirc', 'alex', 'tony', 'seven']

count 计算元素出现次数

1 name_list=["eirc","alex","tony"]
2 name_list.append('seven')
3 name_list.append('seven')
4 name_list.append('seven')
5 name_list.append('seven')
6 print(name_list.count('seven'))
7 
8 #输出结果 4

extent 扩展（批量添加）

# iterable 可迭代的

1 name_list=["eirc","alex","tony"]
2 name_list.append('seven')
3 name_list.append('seven')
4 name_list.append('seven')
5 name_list.append('seven')
6 print(name_list.count('seven'))
7 temp=[111,222,33,44]
8 name_list.extend(temp)
9 print(name_list)
#输出结果

　　4
　　['eirc', 'alex', 'tony', 'seven', 'seven', 'seven', 'seven', 111, 222, 33, 44]

index 获取指定元素的索引

1 name_list=["eirc","alex","tony"]
2 name_list.append('seven')
3 print(name_list.index("alex"))
4 #输出结果 1

insert 向指定索引插入元素

1 name_list=["eirc","alex","tony"]
2 name_list.insert(1,'SEVEN')
3 #在索引值为1的位置插入SEVEN
4 print(name_list)
5 #输出结果['eirc', 'SEVEN', 'alex', 'tony']

pop 在原list中移除列表尾部，并且可以将其赋值给其他变量

1 name_list=["eirc","alex","tony"]
2 i = name_list.pop()
3 print(i)
4 print(name_list)
5 #输出结果tony
6 ['eirc', 'alex']

remove 在list中移除某个元素（从左边找到的第一个元素）

1 name_list=["eirc","alex","tony"]
2 name_list.remove("tony")
3 print(name_list)
4 #输出结果
5 ['eirc', 'alex']

reverse 将list中的元素翻转

1 name_list=["eirc","alex","tony"]
2 name_list.reverse()
3 print(name_list)
4 #输出结果['tony', 'alex', 'eirc']

sort 排序

1 name_list=["eirc","alex","tony"]
2 name_list.sort()
3 print(name_list)
4 #输出结果['alex', 'eirc', 'tony']

del 删除指定位置的元素（也可以执行切片删除）

1 name_list=["eirc","alex","tony"]
2 del name_list[1]
3 print(name_list)
4 #输出结果['eirc', 'tony']

1 name_list=["eirc","alex","tony","seven"]
2 del name_list[1:3]
3 print(name_list)
4 #输出结果['eirc', 'seven']

list类型功能剖析

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