for x in [ '1','2','3','4','5','6','7','8','9' ]:
for y in [ '2','3','4','5','6','7','8','9' ]:
if x < y
print x + y
方法一：
# -*- coding: utf-8 -*-
d = {
95:'Adam',
85:'Lisa',
59:'Bart'
}
if d[85] == name:
print name
方法二：
d = {
'Adam': 95,
'Lisa': 85,
'Bart': 59
}
#score = 85
for name in d:
if d[name] == 85:
print name
s = set(['Adam', 'Lisa', 'Paul'])
L = ['Adam', 'Lisa', 'Bart', 'Paul']
for name in L:
if name in s:
s.remove(name)
else:
s.add(name)
print s
