How to fix "ImportError: attempted relative import with no known parent package"

Question

I am creating a python package which follows the structure:

project
├── package
│   ├── __init__.py
│   ├── __main__.py
│   └── subpackage01
│       ├── functions01.py
│       ├── __init.py__
│       └── subpackage02
│           ├── functions02.py
│           ├── __init__.py
├── requirements.txt
├── setup.py

In __main__.py I have from .subpackage01.functions01 import foo which gives me the error ImportError: attempted relative import with no known parent package.

If I remove the dot before subpackage01 it works but stops working in my pypi package. Removing the dot, building the package and uploading it gives me the error ModuleNotFoundError: No module named 'subpackage01'.

I can't understand the why, since in functions01.py I have relative imports for subpackage02 that works with no problem. Also I can't figure out why it works when the package is built and doesn't in a local development environment.

Is the `__init__.py` spelled correctly in the `subpackage01` directory? — slayer, Jun 06 '19 at 02:57

score 1 · Answer 1 · answered Jun 06 '19 at 03:06

1

Try from subpackage01.functions01 import foo it's a subtle difference by removing the leading dot from subpackage01.

answered Jun 06 '19 at 03:06

slayer

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But if I do it, after building the package for pipy it doesnt work – Vitor Falcão Jun 06 '19 at 03:22

How to fix "ImportError: attempted relative import with no known parent package"

1 Answers1