如果给定的字符串与某些格式不匹配，则会引发哪种异常？ [英] Which exception to raise if a given string does not match some format?

问题描述

这是较旧问题的追踪。

给定一个ISBN号码，例如 3-528-03851-5 如果传入的字符串与格式X-XXX-XXXXX-X格式不符，我应该提出哪种异常类型？

Given a ISBN number, e.g. 3-528-03851-5 which exception type should I raise if the passed in string doesn't match the format X-XXX-XXXXX-X?

推荐答案

提高 ValueError 。

几乎是说你给我一个没有意义的价值的标准方式。例如：

It's pretty much the standard way of saying "you've given me a value that doesn't make sense". For example:

>>> int("a")
Traceback (most recent call last):
  File "", line 1, in 
ValueError: invalid literal for int() with base 10: 'a'
>>> import shlex; shlex.split("'")
Traceback (most recent call last):
   ...
ValueError: No closing quotation

与一个 TypeError 对比，当类型不正确时，它引发：

Contrast this with a TypeError, which is raised when a type is incorrect:

>>> d = {}
>>> d[{}]
Traceback (most recent call last):
  File "", line 1, in 
TypeError: unhashable type: 'dict'

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