参考方案：

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

a = [x for x in range(1, 101)]
b = (a[0] + a[-1]) * (len(a) // 2)
if len(a) % 2 != 0:
    b += a[(len(a) - 1) // 2]
print(b)

参考方法：

#!/usr/bin/python
# -*- coding: UTF-8 -*-
#Sn=n*a1+n*(n-1)*d/2

a1=1
d=1
n=100
S100=100*1+100*(100-1)*1/2
print 'total:',S100

使用while循环统计

i=0
total=0
while i<=100:
    total=total + i
    i  = i +1
print(total)