def move(n, a, b, c):
if n==1:
print a,'-->',c
else:
move(n-1,a,c,b)
move(1,a,b,c)
move(n-1,b,a,c)
move(4, 'A', 'B', 'C')
if n==1:
print a,'-->',c
else:
move(n-1,a,c,b)
move(1,a,b,c)
move(n-1,b,a,c)
move(4, 'A', 'B', 'C')
2016-11-01
def square_of_sum(L):
sum = 0
for x in L:
sum = sum+x*x
return sum
print square_of_sum([1, 2, 3, 4, 5])
print square_of_sum([-5, 0, 5, 15, 25])
sum = 0
for x in L:
sum = sum+x*x
return sum
print square_of_sum([1, 2, 3, 4, 5])
print square_of_sum([-5, 0, 5, 15, 25])
2016-11-01
s = set(['Adam', 'Lisa', 'Paul'])
L = ['Adam', 'Lisa', 'Bart', 'Paul']
for x in L:
if x in s:
s.remove(x)
else:
s.add(x)
print s
L = ['Adam', 'Lisa', 'Bart', 'Paul']
for x in L:
if x in s:
s.remove(x)
else:
s.add(x)
print s
2016-10-31
s = set([('Adam', 95), ('Lisa', 85), ('Bart', 59)])
for x in s:
print x[0],':',x[1]
for x in s:
print x[0],':',x[1]
2016-10-31
当索引数字为负数时,表示逆序读出List中的内容,记住List的最后一个空间的编号为-1开始.
L = [95.5,85,59]
print L[0]
print L[1]
print L[2]
print L[-1]
L = [95.5,85,59]
print L[0]
print L[1]
print L[2]
print L[-1]
2016-10-31
print [int(str(m)+str(n)+str(m)) for m in range(1,10) for n in range(0,10)]
2016-10-31
# -*- coding: utf-8 -*-
print r'''静夜思
床前明月光,
疑是地上霜。
举头望明月,
低头思故乡。'''
print r'''静夜思
床前明月光,
疑是地上霜。
举头望明月,
低头思故乡。'''
2016-10-30