Python 学习第一周

一、pycharm安装

https://www.cnblogs.com/dcpeng/p/9031405.html

二，代码联系

1、输入输出（明文）：

　　username = input("usrname:"）

password = input("password:"）

　　print(username,password)

2、输入输出（暗文）：

import getpass ##输入的时候没有显示输入字符

username = input("usrname:")

password = getpass.getpass("password:")print(username,password)

3、验证输入的账号密码是否正确：

_username = ‘alex‘_password = ‘abc123‘username = input("username")password = input(‘password:‘)if _username == username and _password ==password:    print("Welcome user {name} login...".format(name=username))else:    print("Invalid username or password!")

4、猜年龄 if else

age_of_oldboy = 56guess_age = int(input("guess age:"))###输入必须为整数，不让报错if guess_age == age_of_oldboy:    print("yes,you got it.")elif guess_age > age_of_oldboy:    print("think smaller....")else:    print("think bigger!")

5、while循环

count = 0while True:    print("count:",count)    count = count+1    if count ==100:        break输出0-99 

原文地址：https://www.cnblogs.com/hapen66/p/10963023.html