s = 'Python was started in 1989 by \"Guido\".\nPython is free and easy to learn.'
2016-10-06
print [100*x+10*y+z for x in range(1,10) for y in range(0,10) for z in range(1,10) if x==z]
2016-10-06
这个是最完善的了,大小写都ok
s = set(str.lower(itm) for itm in['Adam', 'Lisa', 'Bart', 'Paul'])
print(str.lower('Adam') in s) #True
print(str.lower('adam') in s) #True
s = set(str.lower(itm) for itm in['Adam', 'Lisa', 'Bart', 'Paul'])
print(str.lower('Adam') in s) #True
print(str.lower('adam') in s) #True
2016-10-06
sum = 0
x = 1
n = 1
while True:
sum = sum + 2**(n-1)
n = n + 1
if n > 20:
break
print (sum)
x = 1
n = 1
while True:
sum = sum + 2**(n-1)
n = n + 1
if n > 20:
break
print (sum)
2016-10-06
L = [75, 92, 59, 68]
sum = 0.0
for i in L:
sum += i
print sum / 4
sum = 0.0
for i in L:
sum += i
print sum / 4
2016-10-06
sum = 0
x = 1
while x< 100:
sum += x
x+=2
print'sum =',sum
x = 1
while x< 100:
sum += x
x+=2
print'sum =',sum
2016-10-06
L = [75, 92, 59, 68]
sum = 0.0
for a in L:
sum += a
print sum / 4.0
sum = 0.0
for a in L:
sum += a
print sum / 4.0
2016-10-06
L = ['Adam', 'Lisa', 'Bart']
b=L[0]
L[0]=L[2]
L[2]=b
print L
b=L[0]
L[0]=L[2]
L[2]=b
print L
2016-10-06