继续坚持呀
#!/usr/bin/python
# coding=utf-8
s=set()
print(s)
s.add('Jenny')
s.add('Ellena')
s.add('Alice')
s.add('Candy')
s.add('David')
s.add('Hally')
s.add('Bob')
s.add('Isen')
s.add('Kari')
print(s)
s=set()
print(s)
new={'Jenny','Ellena','Alice','Candy','David','Hally','Bob','Isen','Kari'}
s.update(new)
print(s)
s=set()
print(s)
new={'Jenny','Ellena','Alice','Candy','David','Hally','Bob','Isen','Kari'}
for x in new:
s.add(x)
print(s)