L = ['Adam', 'Lisa', 'Paul', 'Bart']
L.pop(2)
L.pop(-1)
print L
L.pop(2)
L.pop(-1)
print L
2016-11-06
倒数第一、倒数第二、倒数第三、倒数第四的分数。
L = [95.5, 85, 59]
print L[0]
print L[-1]
print L[-2]
print L[-3]
打印顺序是不是该这样。。
还是说
L = [95.5, 85, 59]
print L[-1]
print L[-2]
print L[-3]
print L[0]
L = [95.5, 85, 59]
print L[0]
print L[-1]
print L[-2]
print L[-3]
打印顺序是不是该这样。。
还是说
L = [95.5, 85, 59]
print L[-1]
print L[-2]
print L[-3]
print L[0]
2016-11-06
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
L = ['Adam', 'Lisa', 'Bart', 'Paul']
for name in L:
if name in s:
s.remove(name)
else:
s.add(name)
print s
2016-11-05
s = set([('Adam', 95), ('Lisa', 85), ('Bart', 59)])
for x,y in s:
print x,':',y
for x,y in s:
print x,':',y
2016-11-05