pytony格式化输出-占位符

1. %s　　s = string　　字符串

2. %d　　d = digit　　整数

3. %f　　f = float　　浮点数

#!/usr/bin/env python
#_*_coding:utf-8_*_
#date: 2018/1/13
#_author_="dingkai"

name = input("your name:")

age = input("your age:")
if age.isdigit():   #像不像数字
    int(age)
else:
    print('age must be int!')
    exit(1) #退出程序

salary = input("your salary:")
if salary.isdigit():  #像不像数字
    int(salary)
else:
    print('salary must be int!')
    exit(1) #退出程序

msg_info = '''
------info of %s ------
name:   %s
age:    %s
salary: %s
------end------
''' %(name,name,age,salary)

print(msg_info)