Python基础---习题

1、从1到100的和

#!/usr/bin/python
#-*- coding:UTF-8 -*-
sum = 0
for i in range(1, 101):
    sum = sum + i
print sum

2、输出1到100中所有的质数

def judge(x):
    for i in range(2, x):
        if x%i == 0:
            return False
    return True

for i in range(2, 101):
    if judge(i):
        print i     

3、计算单词出现次数

f = open("test.txt")
lines = f.readlines()
count = {}
for line in lines:
    tokens = line.strip().split(' ')
    for token  in tokens:
        if token not in count:
            count[token] = 0
        count[token] += 1

for word in count:
    print word, count[word]