L = ['Adam', 'Lisa', 'Bart']
L[-1]="Adam"
L[0]="Bart"
print L
L[-1]="Adam"
L[0]="Bart"
print L
2016-08-18
L = ['Adam', 'Lisa', 'Paul', 'Bart']
L.pop(2)
L.pop(2)
print L
L.pop(2)
L.pop(2)
print L
2016-08-18
L = ['Adam', 'Lisa', 'Bart']
L.insert(0,L.pop())
L.append(L.pop(1))
print L
L.insert(0,L.pop())
L.append(L.pop(1))
print L
2016-08-18
我的蠢办法
for x in range(1,9):
for y in range(1,10):
if x<y:
n=x*10
n=n+y
print (n)
for x in range(1,9):
for y in range(1,10):
if x<y:
n=x*10
n=n+y
print (n)
2016-08-18