容器类型转换

tuple()

将某个序列转换成元组

list()

将某个序列转换成列表

set()

将某个序列转换成集合。集合可以完成列表去重；并且不支持下标

list1 = [10, 20, 30, 40, 50, 20]
s1 = {100, 200, 300, 400, 500}
t1 = ('a', 'b', 'c', 'd', 'e')

print(tuple(list1)) #(10, 20, 30, 40, 50, 20)
print(tuple(s1)) # (100, 200, 300, 400, 500)

print(list(s1)) #[100, 200, 300, 400, 500]
print(list(t1)) #['a', 'b', 'c', 'd', 'e']

print(set(list1)) # {10, 20, 30, 40, 50}
print(set(t1)) # {'b', 'e', 'd', 'c', 'a'}