python之字符串format()方法

format()方法就是格式化指定的值，然后再将其插入字符串的占位符内

占位符用大括号{}来定义哈，可以使用命名索引{sws}、编号索引{0}、甚至空的占位符{}来标识占位符。

语法就是

string.format(value1, value2...)

话不多说，来看代码实在点

sws_1 = "My name is {name}, I'm {age}".format(name="Slowsnail", age=20)
sws_2 = "My name is {0}, I'm {1}".format("Slowsnail", 20)
sws_3 = "My name is {}, I'm {}".format("Slowsnail", 20)

print(sws_1, '\n', sws_2, '\n', sws_3)

结果肯定大家都已经想到啦

My name is Slowsnail, I'm 20
 My name is Slowsnail, I'm 20
 My name is Slowsnail, I'm 20

更多占位符的使用技巧，推荐大家看看https://www.w3school.com.cn/python/ref_string_format.asp