Python打印方式: with 'format' or percent form?

Question

这个问题在这里已经有了答案:

String formatting: % vs. .format vs. f-string literal (16 个答案)

关闭 7年前。

在 Python 中似乎有两种不同的方式来生成格式化输出:

user = "Alex"
number = 38746
print("%s asked %d questions on stackoverflow.com" % (user, number))
print("{0} asked {1} questions on stackoverflow.com".format(user, number))

有没有一种方法比另一种更受欢迎？它们是等价的，有什么区别？应该使用什么形式，尤其是 Python3？

Answer 1

使用 format 方法，特别是如果您担心 Python 3 和 future 。来自 the documentation :

The formatting operations described here are modelled on C's printf() syntax. They only support formatting of certain builtin types. The use of a binary operator means that care may be needed in order to format tuples and dictionaries correctly. As the new :ref:string-formatting syntax is more flexible and handles tuples and dictionaries naturally, it is recommended for new code. However, there are no current plans to deprecate printf-style formatting.