python 列表list

python 列表list

'''
list
'''
## 申明
list1 = ['a','m','c','g','b']
## 访问
print(list1[2])
print(list1[-2])
print(list1[0:2])
print(list1[2:])
## 修改
print("---------------------------")
list1[2]="mm"
print(list1[2])
## 添加
list1.append("xx")
print(list1[-1])
print(list1)
## 删除
del list1[2]
list1.remove("a")
print(list1)
## 判断某个元素是否包含在列表中
iscontent = 3 in [1,5,7]
print(iscontent)
## 拿到list的长度
listlength = len(list1)
print(listlength)
## 两个list之间相加
listsum = [1,5,7]+[2,4,8]
print(listsum)
## 使用循环遍历list
### while
i = 0
listsumlen = len(listsum)
while i < listsumlen :
   print(listsum[i])
   i=i+1
### for循环
for item in listsum :
    print(item)