python-9-列表的增删改查

# 1、append 增
li = [‘XL‘, [3, 2, 1], ‘小龙‘, ‘aiya‘, ‘lushen‘]
li.append(‘FPX‘)
print(li)

# 2、insert 指定下标插入
li = [‘XL‘, [3, 2, 1], ‘小龙‘, ‘aiya‘, ‘lushen‘]
li.insert(0, ‘FPX‘)
print(li)

# 3、元素迭代,int无法迭代
li = [‘XL‘, [3, 2, 1], ‘小龙‘, ‘aiya‘, ‘lushen‘]
li.extend(‘小龙‘)
print(li)

# 1、pop 删除
li = [‘XL‘, [3, 2, 1], ‘小龙‘, ‘aiya‘, ‘lushen‘]
name = li.pop(2)   # 有返回值
name1 = li.pop()    # 默认删除最后一个
print(name)
print(li)

# # 2、remove：按元素清除
li = [‘XL‘, [3, 2, 1], ‘小龙‘, ‘aiya‘, ‘lushen‘]
li.remove(‘小龙‘)
print(li)

# 3、clear：清空
li = [‘XL‘, [3, 2, 1], ‘小龙‘, ‘aiya‘, ‘lushen‘]
li.clear()
print(li

# 4、切片删除
# del li
li = [‘XL‘, [3, 2, 1], ‘小龙‘, ‘aiya‘, ‘lushen‘]
del li[0:3]
print(li)

# 1、下标直接赋值修改
li = [‘XL‘, [3, 2, 1], ‘小龙‘, ‘aiya‘, ‘lushen‘]
li[0] = ‘男人‘
print(li)

# 2、切片会迭代处理
li = [‘XL‘, [3, 2, 1], ‘小龙‘, ‘aiya‘, ‘lushen‘]
li[1:2] = ‘123456‘
print(li)

# 传列表
li = [‘XL‘, [3, 2, 1], ‘小龙‘, ‘aiya‘, ‘lushen‘]
li[1:3] = [‘后裔‘, ‘鲁班‘]
print(li)

li = [‘XL‘, [3, 2, 1], ‘小龙‘, ‘aiya‘, ‘lushen‘]
for i in li:
    print(i)
print(li[0:2])