Attempted relative import with no known parent package

python-3.x python-import importerror
Puneet Shekhawat picture Puneet Shekhawat · Mar 10, 2019 · Viewed 60.3k times · Source 
from ..box_utils import decode, nms

This line is giving error

ImportError: attempted relative import with no known parent package

What is this error and how to resolve this error?

Answer

Tobias Feil picture Tobias Feil · Jun 3, 2019

Apparently, box_utils.py isn't part of a package. You still can import functions defined in this file, but only if the python script that tries to import these functions lives in the same directory as box_utils.py, see this answer.

Nota bene: In my case, I stumbled upon this error with an import statement with one period, like this: from .foo import foo. This syntax, however, tells Python that foo.py is part of a package, which wasn't the case. The error disappeared when I removed the period.

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