sum = 0
x = 1
n = 1
while True:
sum=sum+2**(x-1)
x=x+1
n=n+1
if n=21:
break
print sum
这也不行？
x = 1
n = 1
while True:
sum=sum+2**(x-1)
x=x+1
n=n+1
if n=21:
break
print sum
这也不行？
2016-10-29
def move(n, a, b, c):
if n==1:
print a,'->',c
return
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
return
else:
move(n-1,a,c,b)
move(1,a,b,c)
move(n-1,b,a,c)
move(4, 'A', 'B', 'C')
2016-10-28
方案1：
L = ['Adam', 'Lisa', 'Bart', 'Paul']
B = range(1,5)
rank_name = zip(B,L)
for index, name in rank_name:
print index, '-', name
方案2：
L = ['Adam', 'Lisa', 'Bart', 'Paul']
for index, name in enumerate(L):
print index+1, '-', name
L = ['Adam', 'Lisa', 'Bart', 'Paul']
B = range(1,5)
rank_name = zip(B,L)
for index, name in rank_name:
print index, '-', name
方案2：
L = ['Adam', 'Lisa', 'Bart', 'Paul']
for index, name in enumerate(L):
print index+1, '-', name
age = 20
>>> if 18 > age >= 6:
print 'teenager'
elif age >= 18:
print 'adult'
else:
print 'kid'
>>> if 18 > age >= 6:
print 'teenager'
elif age >= 18:
print 'adult'
else:
print 'kid'
2016-10-28
d = { 'Adam': 95, 'Lisa': 85, 'Bart': 59 }
def generate_tr(name, score):
if score < 60:
return '<tr><td>%s</td><td style="color:red">%s</td></tr>' % (name, score)
return '<tr><td>%s</td><td>%s</td></tr>' % (name, score)
tds = [generate_tr(name, score) for name, score in d.iteritems()]
def generate_tr(name, score):
if score < 60:
return '<tr><td>%s</td><td style="color:red">%s</td></tr>' % (name, score)
return '<tr><td>%s</td><td>%s</td></tr>' % (name, score)
tds = [generate_tr(name, score) for name, score in d.iteritems()]
2016-10-28
sum = 0
x = 1
while x<100 and x=(x/2==0):
sum+=x
print sum
x = 1
while x<100 and x=(x/2==0):
sum+=x
print sum
2016-10-28
# -*- coding: utf-8 -*-
d = {
95: 'Adam',
85: 'Lisa',
59: 'Bart'
}
for key in d:
if key == 95:
print(key,d.get(key))
d = {
95: 'Adam',
85: 'Lisa',
59: 'Bart'
}
for key in d:
if key == 95:
print(key,d.get(key))
2016-10-28
还有这几个方法都行的：
L = ['Adam', 'Lisa', 'Paul', 'Bart']
L.pop(2)
L.pop(2)
print L
L = ['Adam', 'Lisa', 'Paul', 'Bart']
L.pop(2)
L.pop()
print L
L = ['Adam', 'Lisa', 'Paul', 'Bart']
L.pop()
L.pop()
print L
L = ['Adam', 'Lisa', 'Paul', 'Bart']
L.pop()
L.pop(2)
print L
L = ['Adam', 'Lisa', 'Paul', 'Bart']
L.pop(2)
L.pop(2)
print L
L = ['Adam', 'Lisa', 'Paul', 'Bart']
L.pop(2)
L.pop()
print L
L = ['Adam', 'Lisa', 'Paul', 'Bart']
L.pop()
L.pop()
print L
L = ['Adam', 'Lisa', 'Paul', 'Bart']
L.pop()
L.pop(2)
print L
2016-10-28