字符串、文件操作，英文词频统计预处理

作业要求来源于：https://edu.cnblogs.com/campus/gzcc/GZCC-16SE2/homework/2646
1.字符串操作：
解析身份证号：生日、性别、出生地等。
代码如下：

# # -*- coding: utf-8 -*-
import re
pattern = r"^[1-6]d{5}[12]d{3}(0[1-9]|1[12])(0[1-9]|1[0-9]|2[0-9]|3[01])d{3}(d|X|x)$"
ID = input("请输入身份证号:")
res = re.match(pattern,ID)
if res == None :
    print("身份证号输入错误")4
else:
    print("身份证号输入正确")
    print('身份证号是：{}'.format(ID))
    year = ID[6:14]
    print('出生年月为:{}'.format(year))
    sex = ID[17]
    if int(sex) % 2 == 1:
       print("性别：男")
    else:
       print("性别：女")

运行之后显示结果如下：

凯撒密码编码与解码

def getTranslatedMessage(mode, message, key):
    if mode[0] == 'd':
        key = -key
    translated = ''
    for symbol in message:
        if symbol.isalpha():
            num = ord(symbol)
            num += key
            if symbol.isupper():
                if num > ord('Z'):
                    num -= 26
                elif num < ord('A'):
                    num += 26
            elif symbol.islower():
                if num > ord('z'):
                    num -= 26
                elif num < ord('a'):
                    num += 26

            translated += chr(num)
        else:
            translated += symbol
    return translated

mode = getMode()
message = getMessage()
if mode[0] != 'b':
    key = getKey()

print('根据你的输入获得到的信息为:')
if mode[0] != 'b':
    print(getTranslatedMessage(mode, message, key))

运行之后显示结果如下：


网址观察与批量生成

代码如下：

import webbrowser as web   # 引入第三方库，并用as取别名web
url='http://news.gzcc.cn/html/xiaoyuanxinwen'
web.open_new_tab(url)
for i in range(1,4):
    url1='http://news.gzcc.cn/html/xiaoyuanxinwen/{}.html'.format(i)
    print(url1)
    web.open_new_tab('http://news.gzcc.cn/html/xiaoyuanxinwen/'+str(i)+'.html')

2.英文词频统计预处理

• 下载一首英文的歌词或文章或小说，保存为utf8文件。
• 从文件读出字符串。
• 将所有大写转换为小写
• 将所有其他做分隔符（,.？！）替换为空格
• 分隔出一个一个的单词
• 并统计单词出现的次数。

text="Mr. Johnson had never been up in an aerophane before and he had read a lot about air accidents," 
     " so one day when a friend offered to take him for a ride in his own small phane, " 
     "Mr. Johnson was very worried about accepting." 
     " Finally, however, his friend persuaded him that it was very safe, and Mr. Johnson boarded the plane."
print(text.lower())
str=", . ! ? - ' :"
for s in  str:
    text=text.replace(s,'')
    print(text.split())
    print(text.count('you'),text.count('her'))

运行之后显示结果如下：