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Relative import in Python

The following post is based on nosklo’s answer who explained relative imports very nicely in this thread.

Imagine the following project structure:

app/ ->
    package_a/ ->
    package_b/ ->

Problem: how to use module_b.py from module_a.py?


  1. you run: python main.py
  2. main.py does: import app.package_a.module_a
  3. module_a.py does: import app.package_b.module_b

Alternatively, 2 or 3 could use: from app.package_a import module_a

That will work as long as you have app in your PYTHONPATH. main.py could be anywhere then.”

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