Import a module from a relative path

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How do I import a Python module given its relative path?

For example, if dirFoo contains and dirBar, and dirBar contains, how do I import into

Here's a visual representation:


Foo wishes to include Bar, but restructuring the folder hierarchy is not an option.

Nov 25, 2020 in Python by anonymous
• 10,520 points

1 answer to this question.

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Assuming that both your directories are real Python packages (do have the file inside them), here is a safe solution for the inclusion of modules relative to the location of the script.

I assume that you want to do this because you need to include a set of modules with your script. I use this in production in several products and works in many special scenarios like scripts called from another directory or executed with python execute instead of opening a new interpreter.

 import os, sys, inspect
 # realpath() will make your script run, even if you symlink it :)
 cmd_folder = os.path.realpath(os.path.abspath(os.path.split(inspect.getfile( inspect.currentframe() ))[0]))
 if cmd_folder not in sys.path:
     sys.path.insert(0, cmd_folder)

 # Use this if you want to include modules from a subfolder
 cmd_subfolder = os.path.realpath(os.path.abspath(os.path.join(os.path.split(inspect.getfile( inspect.currentframe() ))[0],"subfolder")))
 if cmd_subfolder not in sys.path:
     sys.path.insert(0, cmd_subfolder)

 # Info:
 # cmd_folder = os.path.dirname(os.path.abspath(__file__)) # DO NOT USE __file__ !!!
 # __file__ fails if the script is called in different ways on Windows.
 # __file__ fails if someone does os.chdir() before.
 # sys.argv[0] also fails, because it doesn't not always contains the path.

As a bonus, this approach does let you force Python to use your module instead of the ones installed on the system.

Warning! I don't really know what is happening when the current module is inside an egg file. It probably fails too.

answered Nov 25, 2020 by Gitika
• 65,910 points

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