初學python，嘗試著寫一寫，僅供參考，歡迎指正！

7.18.1 強口令檢測

import re
passWord=str(input('請輸入口令，長度不小於8\n'))
if len(passWord)<8:
    passWord=input('the length must be bigger than eight\n')
if re.compile(r'[A-Z]').search(passWord)==None:
    passWord=input('password must contain Upper character\n')
if re.compile(r'[a-z]').search(passWord)==None:
    passWord=input('password must contain lower character\n')
if re.compile(r'[0-9]').search(passWord)==None:
    passWord=input('password must contain digit\n')
else:
    print('proper password,congratulations')
 

7.18.2 strip()的正則表示式版本

import re
def stripFunc(aString,arguement=''):
    if arguement=='':
        aString=re.compile(r'^\s*').sub('',aString)
        aString=re.compile(r'\s*$').sub('',aString)
        print(aString)
    else:
        aString=re.compile('^'+arguement+'*').sub('',aString)
        aString=re.compile(arguement+'*$').sub('',aString)
        print(aString)
stringOne=str(input('print original string\n'))
stringTwo=str(input('print replacement string\n'))
stripFunc(stringOne,arguement=stringTwo)