Python 字符串占位符与.format格式化的用法
Posted Wiki of Richard_Liang
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直接上代码,一看就能懂:
my_name = ‘Richard‘ age = 22 salary = int(input(‘please input your salary:‘)) #method 1 占位符,%s表示只能接受string, %d代表只能接受数字,所以上边salary接受的input输入,需要强转为int类型 res1 = ‘res1: My name is %s ,I‘m %d years old, my salary is %d‘%(my_name,age,salary) print(res1) #method 2 .format的用法1,需要用{n}作占位符,占位符从0开始 res2 = ‘res2: My name is {0} ,I‘m {1} years old, my salary is {2}‘.format(my_name,age,salary) print(res2) #method 3 .format的用法2,需要用{alias}作占位符 res3 = ‘res3: My name is {_name} ,I‘m {_age} years old, my salary is {_salary}‘.format(_name=my_name,_age=age,_salary=salary) print(res3)
运行结果:
please input your salary:22222 res1: My name is Richard ,I‘m 22 years old, my salary is 22222 res2: My name is Richard ,I‘m 22 years old, my salary is 22222 res3: My name is Richard ,I‘m 22 years old, my salary is 22222
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