变量：python
五．注意：python是可执行程序 在linux写python第一行必须写#!/usr/bin/env python（声明解释器在windows中写python第一行须要写# -*- coding:utf-8 -*-linux
Pycharm:开发调试效率高 在pycharm中new project 而且天天建立一个目录右键diectory命名为day1windows
(1).在day1中建立一个程序 右键new python file命名为var 注意若是想在python中想要有模板 能够在view中点击toolbar点击小工具选项editor选择file and code templates选择python scpipt写上本身想要的模板 点击apply选择okapp
（2）能够输出hello 运行工具
六．变量var定义规则：变量名只能是字母、数字或下划线的任意组合oop
变量名的第一个字符不能是数字优化
如下关键字不能声明为变量明命令行
注释单行#注释多行‘’‘。。。’‘’调试
七．用户输入code
#用户输入三种格式 第一种输入方法
#username = input('username:')
#username = input('password:')
#print(username,password)
#用户输入格式 第二种输入方法
#n1ame = input('name:')
#age = input ('age:')
#job = input('job:')
#salary = input('salary')
#info = '''
#------- info of $ ------
#name:
#age:
#job:
#salary:
#'''
#亦或者是这个用户输入方式
# name = input('name:')
#age = input ('age:')
#job = input('job:')
#salary = input('salary')
#info = '''
#------- info of '''+name+'''------
#name:'''+age+'''
#age:'''+job+'''
#job:'''+salary
#'''
#亦或是第三种方式输入
#name = input('name:')
#age = input ('age:')
#job = input('job:')
#salary = input('salary:')
#info = '''
#------- info of %s ------
#name:%s
#age:%s
#job:%s
#salary:%s
#''' % (name,name,age,job,salary)
#print(info)
#%s=string %d表明只接受数字 帮助监测数据类型 %d再次执行 这样执行会报错not str
#name = input('name:')
#age = input ('age:')
#job = input('job:')
#salary = input('salary:')
#info = '''
#------- info of %s ------
#name:%s
#age:%d
#job:%s
#salary:%s
#''' % (name,name,age,job,salary)
#print(info)
#解决上面数字类型报错问题
name = input('name:')
age = int(input ('age:'))#强制转换成数字 int=integer整形
print(type(age))
job = input('job:')
salary = input('salary:')
info = '''
------- info of %s ------
name:%s
age:%d
job:%s
salary:%s
''' % (name,name,age,job,salary)
print(info)
#以上执行结果是正确的
#把整形转换成字符串
name = input('name:')
age = int(input ('age:'))#强制转换成数字 int=integer整形
print(type(age) ,type( str(age) ))#强制转换成上面那一种
job = input('job:')
salary = input('salary:')
info = '''
------- info of %s ------
name:%s
age:%d
job:%s
salary:%s
''' % (name,name,age,job,salary)
print(info)
#info2写入用户输入
from os import name
ame = input('name:')
age = input ('age:')
job = input('job:')
salary = input('salary:')
info2 = '''
------- info of {_name} ------
name:{_name}
age:{_age}
job:{_job}
salary:{_salary}
'''.format(_name=name,
_age=age,
_job=job,
_salary=salary)
print(info2)#以上是info2的用户输入
#info3写入方法
from os import name
name = input('name:')
age = input ('age:')
job = input('job:')
salary = input('salary:')
info3 = '''
------- info of {0} ------
name:{0}
age:{1}
job:{2}
salary:{3}
'''.format(name,age,job,salary)
print(info3)#以上是info3的用户输入方式
#input的三种格式 info info2 info3
#用户密文密码
import getpass（getpass语句）
username = input('username:')
password = getpass.getpass('password:')
print(username,password)
#密文密码最好用cmd命令行敲出 在pycharm使用不来 命令行是 d: cd 根目录 再dir一下
#而后敲出python var.py(存放密文密码的路径)
十二．If else流程判断
#十二.if else流程判断
_username = 'hansha'
_password = '1234'
username = input('username:')
password = input('password:')
print(username,password)
if _username == username and _password == password:
print('welcome user{name}login...'.format(name=username))
else:
print('invalid username or password!')
#if else猜想年龄
age_of_oldboy = 30
guess_age = int(input('guess age:'))
if guess_age == age_of_oldboy :
print('yes,you got it.')
elif guess_age > age_of_oldboy:
print('think smaller...')
else:
print('think bigger!')
十三.while循环语句
#count = 0
#while True :
# print('count:',count)
# count = count +1 #count + =1
# if count == 1000:
# break
#猜想年龄加上while循环语句
age_of_oldboy = 56
count = 0
while True:#while循环语句
if count ==3:#可执行三次
break#猜想三次结束
guess_age = int(input('guess age:'))
if guess_age == age_of_oldboy :
print('yes,you got it.')
break#猜对结束
elif guess_age > age_of_oldboy:
print('think smaller...')
else:
print('think bigger!')
count +=1#while循环结束语句
#while循环语句优化
age_of_oldboy = 56
count = 0
while True:#while循环语句
if count <3:#和上段代码比较 优化的语句
break#猜想三次结束
guess_age = int(input('guess age:'))
if guess_age == age_of_oldboy :
print('yes,you got it.')
break#猜对结束
elif guess_age > age_of_oldboy:
print('think smaller...')
else:
print('think bigger!')
count +=1#while循环结束语句
else：
print ('你试了太屡次 已结束')
#while循环改为for循环 摘抄上段while循环语句代码
age_of_oldboy = 56
for i in range(3) :
guess_age = int(input('guess age:'))
if guess_age == age_of_oldboy :
print('yes,you got it.')
break
elif guess_age > age_of_oldboy:
print('think smaller...')
else:
print('think bigger!')
else:
print ('你试了太屡次 已结束')
#for循环隔开循环
for i in range(0,10,2):#0到10 隔开2个数字写出一个
print('loop',i)
#循环猜想用户猜错三次是否继续小游戏
age_of_oldboy = 56
count = 0
while count <3:#while循环语句
guess_age = int(input('guess age:'))
if guess_age == age_of_oldboy :
print('yes,you got it.')
break#猜对结束
elif guess_age > age_of_oldboy:
print('think smaller...')
else:
print('think bigger!')
count +=1#while循环
if count == 3:
countine_confirm = input ('do you want to keep guessing...?')#当用户已经猜错三次以后询问用户是否继续猜想
if countine_confirm != 'n':#!=是不等于 若是用户输入n 肯定不继续
count =0
十四. continue and break
#十四continue and break
'''for i in range(0,10):
if i <3:
print('loop',i)
else :
continue
print('hehe')#continue跳出本次循环，继续下一循环 break结束整个循环'''