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Editorial Team
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Asked: 2026-05-15T10:53:49+00:00

errors = {} #errorexample errors[‘id’] += (‘error1’,) errors[‘id’] += (‘error2’,) #works but ugly errors[‘id’]

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errors = {}

#errorexample
errors['id'] += ('error1',)
errors['id'] += ('error2',)

#works but ugly
errors['id'] = ('error1',)
errors['id'] += ('error2',)

If ‘error1’ is not present it will fail. Do I really have to extend dict?

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1 Answer

  1. Editorial Team

    Use a collections.defaultdict instead of a plain dict — this kind of convenience, after all, is exactly what the default-dict type was introduced for:

    >>> import collections
>>> errors = collections.defaultdict(tuple)
>>> errors['id'] += ('error1',)
>>> errors['id'] += ('error2',)
>>> errors['id']
('error1', 'error2')
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