python基础，,导入getpass掩

python基础，,导入getpass掩

导入getpass掩码模块：
1 import getpass2 user =  raw_input("pls user:")3 passwd = getpass.getpass("pls passwd:")4 print(user,passwd)
输出的结果展示为：

 1 #每一行最多不能超过80字符 2 user_input = input("input your name:") 3 age_input = input("input your age:") 4 work_input = input("input your work:") 5 msg=‘‘‘ 6 Infomation of %s: 7 ----------------- 8 Name : %s 9 Age  : %s10 Work : %s11 -------End-------12 ‘‘‘ %(user_input,user_input,age_input,work_input)13 print(msg)

1 #在linux自己写的模块放在这个目录下：/usr/lib/python2.7/dist-packages，import便可直接导入2 import sys3 print(sys.path)#打印系统的环境变量

1 import os2 os.system("dir f:\Java\code")#查看这个目录下的内容3 4 os.mkdir("han")#创建han文件夹5 6 cmd = os.popen("dir f:\Java\code").read()7 print(cmd)  #将要查看的内容保存在一个变量里然后打印出来

 1 if语句 v1 2 user = "han" 3 passwd = "han" 4  5 username = input("username:") 6 password = input("password:") 7  8 if user == username: 9     print("user the same is username!")10     if password == passwd:11         print("welcome login!")12     else:13         print("password is invalid..")14 else:15     print("you get out!")

 1 if语句 v2 2 user = "han" 3 passwd = "kai" 4  5 username = input("username:") 6 password = input("password:") 7  8 if user == username and passwd == password: 9     print("welcome lgin!")10 else:11     print("invalid username or password..try again!")

循环语句：

 猜年龄：
 1 age = 26 2  3 guess_num = int(input("input your guess num:")) 4  5 if guess_num == age: 6     print("Congratulations! you got it.") 7 elif guess_num > age: 8     print("think smaller!") 9 else:10     print("think big!")

 只能猜三次年龄：
 1 age = 26 2  3 for i in range(10): 4     if i < 3: 5         guess_num = int(input("input your guess num:")) 6  7         if guess_num == age: 8             print("Congratulations! you got it.") 9             break10         elif guess_num > age:11             print("think smaller!")12         else:13             print("think big!")14     else:15         print("Too many attempts..bye ")16         break

 最终优化版
 1 age = 25 2  3 counter = 0 4 for i in range(10): 5     if counter < 3: 6         guess_num  = int(input("pls input an number:")) 7         if guess_num == age: 8             print("you are great!") 9             break10         elif guess_num > age:11             print("the bigger")12         else:13             print("the smaller")14     else:15         continue_comfirm = input("do you want to continue?")16         if continue_comfirm == "y":17             counter = 018             continue19         else:20             print("bye")21             break22     counter += 1

python基础