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How to Resolve Circular Dependency Errors in Python Imports?

Barbara Streisand
Barbara StreisandOriginal
2024-12-19 12:11:26879browse

How to Resolve Circular Dependency Errors in Python Imports?

TypeError: Circular Dependency in Python Import Process

When working with multiple Python modules, importing them from each other can create a circular dependency scenario. Consider the following code structure:

# main.py
from entity import Ent

# entity.py
from physics import Physics
class Ent:
    ...

# physics.py
from entity import Ent
class Physics:
    ...

This structure leads to an import error, as shown in the traceback:

...
ImportError: cannot import name Ent

This error is caused by importing entity from physics before Ent is defined in entity. To resolve this, remove the dependency to physics from entity. In other words, ensure that modules are imported in a way that does not create circular dependencies.

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