def square_of_sum(L):
sum=0
for x in L:
sum+=x*x
return sum
print square_of_sum([1, 2, 3, 4, 5])
print square_of_sum([-5, 0, 5, 15, 25])
return 和FOR对齐或不对齐,会是两种结果
sum=0
for x in L:
sum+=x*x
return sum
print square_of_sum([1, 2, 3, 4, 5])
print square_of_sum([-5, 0, 5, 15, 25])
return 和FOR对齐或不对齐,会是两种结果
2017-03-10
L = [95.5, 85, 59,60]
print L[-1]
print L[-2]
print L[-3]
print L[-4]
print L[-1]
print L[-2]
print L[-3]
print L[-4]
2017-03-10
sum = 0.0
for k, v in d.items():
sum = sum + v
print k,':',v
print 'average', ':', sum*1.0/len(d)
for k, v in d.items():
sum = sum + v
print k,':',v
print 'average', ':', sum*1.0/len(d)
2017-03-10