Day1：用户交互与格式化输出

Posted 2020-10-10 中华酷联

一、用户交互

　　input()方法

　　

1 #!/usr/bin/env python
2 # -*- coding:utf-8 -*-
3 # Author:Hiuhung Wan
4 
5 username = input("Username:")
6 password = input("Password:")
7 print(username,password)

View Code

　　raw_input()   python 2.x 与input()  python 3.x是一样的

二、格式化输出

　　1.字符串拼接，使用加号“+”（不推荐使用）

　　

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 # Author:Hiuhung Wan
 4 name = input("name:")
 5 age = input("age:")
 6 job = input("job:")
 7 salary = input("salary:")
 8 info = ‘‘‘
 9 --------- info of ‘‘‘+ name + ‘‘‘ ----------
10 Name:‘‘‘+ name +‘‘‘
11 Age:‘‘‘+ age + ‘‘‘
12 Job:‘‘‘+ job + ‘‘‘
13 Salary:‘‘‘+salary
14 print(info)

View Code

　　2.用$占位符

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 # Author:Hiuhung Wan
 4 name = input("name:")
 5 age = input("age:")
 6 job = input("job:")
 7 salary = input("salary:")
 8 info = ‘‘‘
 9 --------- info of %s ----------
10 Name:%s
11 Age:%s
12 Job:%s
13 Salary:%s
14 ‘‘‘%(name,name,age,job,salary)
15 print(info)

View Code

　　其中%s的s代表的是string，还有$d,$f

　　python中，默认的所有输入当作字符串

　　如果age改成$d,需要将用户的输入转格式，如int()，或str()

　　3.format方法一

　　

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 # Author:Hiuhung Wan
 4 name = input("name:")
 5 age = int(input("age:"))   #integer
 6 #print(type(age),type(str(age)))
 7 job = input("job:")
 8 salary = input("salary:")
 9 info2 = ‘‘‘
10 --------- info of {_name} ----------
11 Name:{_name}
12 Age:{_age}
13 Job:{_job}
14 Salary:{_salary}
15 ‘‘‘.format(_name = name , _age = age, _job = job,_salary = salary)
16 print(info2)

View Code

　　4.format方法二

　　

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 # Author:Hiuhung Wan
 4 name = input("name:")
 5 age = int(input("age:"))   #integer
 6 #print(type(age),type(str(age)))
 7 job = input("job:")
 8 salary = input("salary:")
 9 info3 = ‘‘‘
10 --------- info of {0} ----------
11 Name:{0}
12 Age:{1}
13 Job:{2}
14 Salary:{3}
15 ‘‘‘.format(name,age,job,salary)
16 print(info3)

View Code

如果参数多，使用此方法容易弄错