What could cause a python module to be imported twice?

by

A Python module can be imported twice if the module is found twice in the path. For example, say your project is laid out like so:

  • src/
    • package1/
      • spam.py
      • eggs.py

Suppose your PYTHONPATH (sys.path) includes src and src/package1:

PYTHONPATH=/path/to/src:/path/to/src/package1

If that’s the case, you can import the same module twice like this:

from package1 import spam
import spam

And Python will think they are different modules. Is that what’s going on?

Also, per the discussion below (for users searching this question), another way a module can be imported twice is if there is an exception midway through the first import. For example, if spam imports eggs, but importing eggs results in an exception inside the module, it can be imported again.

More Related Contents:

  1. `from … import` vs `import .` [duplicate]
  2. Adding a module (Specifically pymorph) to Spyder (Python IDE)
  3. Import module from subfolder
  4. Python: importing a sub‑package or sub‑module
  5. Can’t import my own modules in Python
  6. Can’t import my own modules in Python
  7. How to import module when module name has a ‘-‘ dash or hyphen in it?
  8. How to import all submodules?
  9. Modules are installed using pip on OSX but not found when importing
  10. Python module with a dash, or hyphen (-) in its name
  11. How to change a module variable from another module?
  12. Use a library locally instead of installing it
  13. How does Python importing exactly work?
  14. How to access a standard-library module in Python when there is a local module with the same name?
  15. How to import a Python module from a sibling folder?
  16. How to import a module in Python with importlib.import_module
  17. Namespaces with Module Imports
  18. How to prevent a module from being imported twice?
  19. ImportError on python 3, worked fine on python 2.7
  20. Python import mechanics
  21. Python importing a module from a parallel directory
  22. How to make global imports from a function?
  23. how to test if one python module has been imported?
  24. from … import OR import … as for modules
  25. Relative import in Python 3 is not working [duplicate]
  26. Flask(‘application’) versus Flask(__name__)
  27. python import module from parent package
  28. How to reference python package when filename contains a period
  29. Relative imports for the billionth time
  30. What happens when a module is imported twice?

Leave a Comment