Python重新学习第一天
Python种类：
JavaPython
cPython ******
pypy (速度最快，但暂非主流）
Python程序：
1.终端、解释器
2.文件形
3.编码：
# -*- coding: utf-8 -*-
unicode 万国码
账号密码验证（最多三次）：
# -*- coding:utf 8 -*-
print('Enter your username and passwd')
user = input('>>>')
passwd = input('>>>')
count = 1
while count < 3:
if user == 'alex' and passwd == '123456':
print('correct')
break
else:
print('uncorrect, enter again')
print('username')
user = input('>>>')
print('passwd')
passwd = input('>>>')
count = count + 1
if count == 3:
print('sorry, your account has been locked')