时间：2020-10-31 19:23:55 | 栏目：Python代码 | 点击：次
有时候，我们需要在字符串中加入相应的变量，以下提供了几种字符串加入变量的方法：
1、+ 连字符
name = 'zhangsan'
print('my name is '+name)
#结果为 my name is zhangsan
2、% 字符
name = 'zhangsan'
age = 25
price = 4500.225
print('my name is %s'%(name))
print('i am %d'%(age)+' years old')
print('my price is %f'%(price))
#保留指定位数小数(四舍五入)
print('my price is %.2f'%(price))
结果为
my name is zhangsan i am 25 years old my price is 4500.225000 my price is 4500.23
3、format()函数
对于变量较多的情况，加入加'+'或者'%'相对比较麻烦，这种情况下可以使用format函数
name = 'zhangsan'
age = 25
price = 4500.225
info = 'my name is {my_name},i am {my_age} years old,my price is {my_price}'\
.format(my_name=name,my_age=age,my_price=price)
print(info)
结果为：
my name is zhangsan,i am 25 years old,my price is 4500.225