刚才拷错了,这个才是:
for x in range(1, 10):
for y in range(10):
if x < y:
print x * 10 + y
for x in range(1, 10):
for y in range(10):
if x < y:
print x * 10 + y
2016-09-23
一个解法:
sum = 0
x = 0
while True:
x = x + 1
if x > 100:
break
if x % 2 == 0:
continue
sum = sum + x
print sum
sum = 0
x = 0
while True:
x = x + 1
if x > 100:
break
if x % 2 == 0:
continue
sum = sum + x
print sum
2016-09-23
一种解法:
sum = 0
x = 1
n = 1
while True:
sum = sum + x
x = 2 ** n
n = n + 1
if n > 20:
break
print sum
sum = 0
x = 1
n = 1
while True:
sum = sum + x
x = 2 ** n
n = n + 1
if n > 20:
break
print sum
2016-09-23
s = set(['Adam' , 'Lisa' , 'Bart' , 'Paul' , 'adam' , 'bart'])
print 'adam' in s
print 'bart' in s
print 'adam' in s
print 'bart' in s
2016-09-23
def greet(x = 'world', y = 'Hello,'):
print(y + x + '.')
greet()
greet('Bart')
print(y + x + '.')
greet()
greet('Bart')
2016-09-23
s = set(['Adam', 'Lisa', 'Paul'])
L = ['Adam', 'Lisa', 'Bart', 'Paul']
for i in L:
if i in s:
s.remove(i)
else :
s.add(i)
print s
L = ['Adam', 'Lisa', 'Bart', 'Paul']
for i in L:
if i in s:
s.remove(i)
else :
s.add(i)
print s
2016-09-23
s = set([('Adam', 95), ('Lisa', 85), ('Bart', 59)])
for x in s:
print x[0]+':'+str(x[1])
for x in s:
print x[0]+':'+str(x[1])
2016-09-23