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Home/ Questions/Q 323133
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Editorial Team
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Editorial Team
Asked: May 12, 20262026-05-12T09:00:10+00:00 2026-05-12T09:00:10+00:00

Given: >>> d = {‘a’: 1, ‘b’: 2} Which of the following is the

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Given:

>>> d = {'a': 1, 'b': 2}

Which of the following is the best way to check if 'a' is in d?

>>> 'a' in d
True
>>> d.has_key('a')
True
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  1. Editorial Team
    Editorial Team
    2026-05-12T09:00:11+00:00Added an answer on May 12, 2026 at 9:00 am

    in is definitely more pythonic.

    In fact has_key() was removed in Python 3.x.

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