01-python3.5-模块导入-while-for-range-break-continue

一、输入用户名和密码----导入getpass模块

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#Author:XZ

"""
name = input("What's your name ?")
print("Hello！ " +  name)

"""
#########
#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：
import getpass

_username = 'alex'
_password = 'abc123'
username = input( "username:")
# 将用户输入的内容赋值给 password 变量
password = getpass.getpass("password:")

#getpass在pycharm中不太好用，建议使用window命令行测试如：

# E:Usersadmin>python I:pycharmPycharmProjects20180908PY201909081-day1-01.py
# username:alex
# password:
# alex aaaa
# E:Usersadmin>

if _username == username and _password == password:
    print("Welcome user {name} login...".format(name=username))
else:
    print("Invalid username or password !")

print(username,password)

二、通过while循环猜年龄

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#Author:XZ

age_of_oldboy = 56

count = 0

while count < 3:
    guess_age = int(input("guess age:"))

    if guess_age == age_of_oldboy:
        print("yes, you get it.")
        break
    elif guess_age > age_of_oldboy:
        print("Think smaller!")
    else:
        print("Think bigger!")
    count +=1
else:
    print("you have tried too many times.. fuck off")

三、while循环打印到1亿的数字

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#Author:XZ

count = 0

while True:
    print("count:",count)
    count = count + 1   #count +=1
    if count == 100000000:
        break

四、range循环打印0-9的数字

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#Author:XZ

for i in range(10):
    print("loop",i)

五、通过range设置猜年龄游戏3次猜错强制退出

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#Author:XZ

age_of_oldboy = 56


for i in range(3):
    guess_age = int(input("guess age:"))

    if guess_age == age_of_oldboy:
        print("yes, you get it.")
        break
    elif guess_age > age_of_oldboy:
        print("Think smaller!")
    else:
        print("Think bigger!")
else:
    print("you have tried too many times.. fuck off")

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#Author:XZ

age_of_oldboy = 56

count = 0

while count < 3:
    guess_age = int(input("guess age:"))

    if guess_age == age_of_oldboy:
        print("yes, you get it.")
        break
    elif guess_age > age_of_oldboy:
        print("Think smaller!")
    else:
        print("Think bigger!")
    count +=1
    if count == 3:
        countine_confirm = input("Do you want to keep guessing ?")
        if countine_confirm != "n":
            count = 0
else:
    print("you have tried too many times.. fuck off")

六、通过range循环打印10以内的偶数

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#Author:XZ
for i in range(0,11,2):
    print("loop",i)

七、循环中break和continue的使用

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#Author:XZ

for i in range(1,10):
    if i < 3:
        print("loop",i)
    else:
        continue
    print("hehe...")
#continue 跳出本次循环，进入下一次循环
#break 结束整个循环

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#Author:XZ

for i in range(10):
    print('------------',i)
    for j in range(10):
        print(j)
        if j > 5:
            break