第十讲：小练习

# -*-　coding:utf-8 -*-
# 练习
# 从1加到100
totol = 0
for i in range(1, 101):
    totol += i
# print totol
# 打出100以内的质数
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
# 判断文件中单词出现的次数
f = open("demo.txt")
lines = f.readlines()
count = {}          # 字典  单词为索引
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]