Python - string formatting: % vs. .format

柔光的暖阳◎ 2022-05-29 06:23 272阅读 0赞

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.format just seems more sophisticated in many ways. An annoying thing about % is also how it can either take a variable or a tuple. You’d think the following would always work:

  1. "hi there %s" % name

yet, if name happens to be (1, 2, 3), it will throw a TypeError. To guarantee that it always prints, you’d need to do

  1. "hi there %s" % (name,)   # supply the single argument as a single-item tuple

which is just ugly. .format doesn’t have those issues. Also .format is much cleaner looking.

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