python元组、集合

元组tuple
元组表达符为：()
t1 = (1,2,3,5,6,7,1)
print(type(t1)) <class 'tuple'>
s=list(t1)
print(type(s)) <class 'list'>
s.append(8)
print(s) [1, 2, 3, 5, 6, 7, 1, 8]
t3=tuple(s)
print(type(t3)) <class 'tuple'>
print(t3) (1, 2, 3, 5, 6, 7, 1, 8)

集合set
最重要的功能就是去重
list6 = [1, 3, 7, 5, 7, 7, 9, 9]
list9 = [2, 4, 6, 8, 10, 2, 4, 6]
jh1 = set(list6)
jh2 = set(list9)
print(jh1) #{1, 3, 5, 7, 9}
print(jh2) #{2, 4, 6, 8, 10}
jh1.update(jh2)
print(jh1) #{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}