message = "hello %s , how are you %s, welcome %s"%("john","john","john")

避免指定“john”3 次而是指定一个短语的最 Pythonic 方式是什么。

最佳答案

我不会使用 % 格式，.format 有很多优点。此外，最初计划删除 % 格式并用 .format 替换它，尽管显然这实际上并没有发生。

A new system for built-in string formatting operations replaces the % string formatting operator. (However, the % operator is still supported; it will be deprecated in Python 3.1 and removed from the language at some later time.) Read PEP 3101 for the full scoop.

>>> "hello {name}, how are you {name}, welcome {name}".format(name='john')
'hello john, how are you john, welcome john'

我更喜欢第一种方式，因为它是明确的，但这就是为什么 .format 优于 % 格式

>>> "hello {0}, how are you {0}, welcome {0}".format('john')
'hello john, how are you john, welcome john'

https://stackoverflow.com/questions/11921649/