版权声明：版权所有，翻版必究【Kevin】 https://blog.csdn.net/weixin_30935137/article/details/82832315
列表
列表定义
list = [1,2,'a','b',[1,2,3],[1,[1,2]]]
可包含任意类型的对象：数值，字符串，列表等
列表常用操作
1）取值
list = ['a','b','c']
print(list[0])
print(list[0:2])
2）添加
list1 = list(range(10))
print(list1)
print("++++++++++++++++++++++++")
print(list1+[11,22,33]) # 生成了一个新的列表，原来的list1不变
print("++++++++++++++++++++++++")
print(list1.append([11,22,33])) # 这里返回的是空值，原来的list1改变了
print(list1) ## 直接在原列表里面添加一个元素
print("++++++++++++++++++++++++")
list1 = list(range(10))
print(list1.extend([11,22,33]))
print(list1) # 扩展原来的列表，注意和append的区别
结果如下：
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
++++++++++++++++++++++++
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33]
++++++++++++++++++++++++
None
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, [11, 22, 33]]
++++++++++++++++++++++++
None
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33]
# x.append('abc')和x.extend('abc')的区别
list = ['a','b','c']
list1 = list.append('abc')
print(list)
print('----------------------')
list = ['a','b','c']
list2 = list.extend('abc')
print(list)
结果如下：
['a', 'b', 'c', 'abc']
----------------------
['a', 'b', 'c', 'a', 'b', 'c']
3）插入
list = list(range(10))
list.insert(3,[1,2])
print(list)
输出结果：
[0, 1, 2, [1, 2], 3, 4, 5, 6, 7, 8, 9]
3）删除
list = list(range(10))
print(list)
list.remove(5) # 删除元素5
print(list)
del list[2:4] # 通过切片删除
print(list)
list.clear() # 清空列表
print(list)
结果如下：
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
[0, 1, 2, 3, 4, 6, 7, 8, 9]
[0, 1, 4, 6, 7, 8, 9]
[]
4）修改
list = ['wu','jia','do']
list[2]='dong' #通过索引重新赋值
print(list)
5）查找
list = ['w','u','j','d']
print('w' in list)
6）排序
list1 = [3,22,1,66,44]
list2 = ["asd",'wj','ad']
list1.sort(reverse = False)
list2.sort() #默认升序
print(list1,list2)
print('+++++++++++++++++++++++++++++++++++')
list1 = [3,22,1,66,44]
list2 = ["asd",'wj','ad']
list3 = sorted(list1) #排序并赋值，生成新列表
print(list1,list3) # list1没有变
结果如下：
[1, 3, 22, 44, 66] ['ad', 'asd', 'wj']
+++++++++++++++++++++++++++++++++++
[3, 22, 1, 66, 44] [1, 3, 22, 44, 66]
列表生成器
range()是生成器，指向了一个范围
range(5)代表指向了0，1，2，3，4这几个值
range(0,10,2)代表指向了0，2，3，4，8这几个值，最后的2代表步长
a = range(10)
print(a,type(a))
结果如下：
range(0, 10) <class 'range'>
b = list(range(4,16,2))
print(b)
结果如下：
[4, 6, 8, 10, 12, 14]
获取列表元素索引位置
list = ['wu','jia','dong','a']
print(list.index("jia"))