python First day

Posted 2020-10-08

1.python 输入和格式化输出。

#!/usr/bin/evn python
# -*- coding:utf-8 -*-
# Author: Aron1)input输入name = input("name:")
age = input("age:")
job = input("job:")
salary = input("salary:")
输入的格式位str
格式转换：
age = int(input("age:"))
输入为int

2)格式化输出的三种方式

①
info = ‘‘‘
------ info of {_name} ------
Name:{_name}
Age:{_age}
job:{_job}
salary:{_salary}
-----------------------------
‘‘‘ .format(_name = name,
　　　　　　　_age = age,
　　　　　　　_job = job,
　　　　　　　_salary = salary　　
)
②
info = ‘‘‘
------ info of {1} ------
Name:{2}
Age:{3}
job:{4}
salary:{5}
-----------------------------
‘‘‘ .format(name,name,age,job,salary）
③
info = ‘‘‘
------ info of %s ------
Name:%s
Age:%s
job:%s
salary:%s
-----------------------------
‘‘‘ %(name,name,age,job,salary）

2.while循环以及for循环

1)while循环
_username = ‘Aron‘
_password = ‘abc123‘
count = 0
while True :
　　password = input("password:")
　　if _username == username and _password == password:
　　　　print("Welcome user {name} login...".format(name=username))
　　　　break
　　else:
　　　　print("Invalid username or password! Please re-enter")
　　count += 1
　　if count == 5 :
　　　　break #(跳出循环) #continue(跳过本次循环，进入下一次循环)

简写:

age_of_oldboy = 56
count = 0
while count < 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 birgger!")
　　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")

2)for 循环

age_of_oldboy = 56

for n in range(0,10,2):
　　print("loop",n)

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 birgger!")
else:
　　print("you have tried too many times..fuck off")