一、输入用户名和密码----导入getpass模块

1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 #Author:XZ 4  5 """ 6 name = input("What's your name ?") 7 print("Hello！ " +  name) 8  9 """10 #########11 #输入密码时，如果想要不可见，需要利用getpass 模块中的 getpass方法，即：12 import getpass13 14 _username = 'alex'15 _password = 'abc123'16 username = input( "username:")17 # 将用户输入的内容赋值给 password 变量18 password = getpass.getpass("password:")19 20 #getpass在pycharm中不太好用，建议使用window命令行测试如：21 22 # E:\Users\admin>python I:\pycharm\PycharmProjects\20180908PY\20190908\1-day1-01.py23 # username:alex24 # password:25 # alex aaaa26 # E:\Users\admin>27 28 if _username == username and _password == password:29     print("Welcome user {name} login...".format(name=username))30 else:31     print("Invalid username or password !")32 33 print(username,password)

 

二、通过while循环猜年龄

1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 #Author:XZ 4  5 age_of_oldboy = 56 6  7 count = 0 8  9 while count < 3:10     guess_age = int(input("guess age:"))11 12     if guess_age == age_of_oldboy:13         print("yes, you get it.")14         break15     elif guess_age > age_of_oldboy:16         print("Think smaller!")17     else:18         print("Think bigger!")19     count +=120 else:21     print("you have tried too many times.. fuck off")

 

三、while循环打印到1亿的数字

1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 #Author:XZ 4  5 count = 0 6  7 while True: 8     print("count:",count) 9     count = count + 1   #count +=110     if count == 100000000:11         break

 

四、range循环打印0-9的数字

1 #!/usr/bin/env python2 # -*- coding:utf-8 -*-3 #Author:XZ4 5 for i in range(10):6     print("loop",i)

 

五、通过range设置猜年龄游戏3次猜错强制退出

1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 #Author:XZ 4  5 age_of_oldboy = 56 6  7  8 for i in range(3): 9     guess_age = int(input("guess age:"))10 11     if guess_age == age_of_oldboy:12         print("yes, you get it.")13         break14     elif guess_age > age_of_oldboy:15         print("Think smaller!")16     else:17         print("Think bigger!")18 else:19     print("you have tried too many times.. fuck off")

 

1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 #Author:XZ 4  5 age_of_oldboy = 56 6  7 count = 0 8  9 while count < 3:10     guess_age = int(input("guess age:"))11 12     if guess_age == age_of_oldboy:13         print("yes, you get it.")14         break15     elif guess_age > age_of_oldboy:16         print("Think smaller!")17     else:18         print("Think bigger!")19     count +=120     if count == 3:21         countine_confirm = input("Do you want to keep guessing ?")22         if countine_confirm != "n":23             count = 024 else:25     print("you have tried too many times.. fuck off")

 

 

 

六、通过range循环打印10以内的偶数

1 #!/usr/bin/env python2 # -*- coding:utf-8 -*-3 #Author:XZ4 for i in range(0,11,2):5     print("loop",i)

 

七、循环中break和continue的使用

1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 #Author:XZ 4  5 for i in range(1,10): 6     if i < 3: 7         print("loop",i) 8     else: 9         continue10     print("hehe...")11 #continue 跳出本次循环，进入下一次循环12 #break 结束整个循环

 

1 #!/usr/bin/env python 2 # -*- coding:utf-8 -*- 3 #Author:XZ 4  5 for i in range(10): 6     print('------------',i) 7     for j in range(10): 8         print(j) 9         if j > 5:10             break