def average(*args):
sum=0
for x in args:
sum=sum+x
if len(args)==0:
return 0.0
else: return 1.0*sum/len(args)
print average()
print average(1, 2)
print average(1, 2, 2, 3, 4)
sum=0
for x in args:
sum=sum+x
if len(args)==0:
return 0.0
else: return 1.0*sum/len(args)
print average()
print average(1, 2)
print average(1, 2, 2, 3, 4)
2016-03-17
d = {
95: 'Adam',
85: 'Lisa',
59: 'Bart'
}
d[72] = 'Paul'
print d # 果然是无序的
95: 'Adam',
85: 'Lisa',
59: 'Bart'
}
d[72] = 'Paul'
print d # 果然是无序的
2016-03-16
x1=1
d=3
i=2
sum=0
while i<=100:
x1=x1+d
sum=sum+x1
i+=1
print(sum+1)
d=3
i=2
sum=0
while i<=100:
x1=x1+d
sum=sum+x1
i+=1
print(sum+1)
2016-03-16