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Python import precedence: packages or modules?

I wasn't clear how to correctly name this question.

Case 1

Assume that I have the following directory structure.

foo
|
+- bar/__init__.py
|
+- bar.py

If I have

from foo import bar

How do I know which bar (bar.py or bar/__init__.py) is being imported? Is there any easy way to automatically detect this from occurring?

Case 2

foo
|
+- foo.py
|
+- other.py

If other.py has the line

import foo

How do I know which foo (foo or foo.foo) is being imported? Again, is tehre any easy way to automatically detect this from occurring?

Answer*

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  • 1
    How do you know it takes precedence? – I couldn't find it in the Python documentation Commented Jan 10, 2017 at 21:56
  • @qff I tested it. I also tested python3 just now and it has the same behavior. A link to official documentation of the fact would be good. If you find one, please feel free to edit my answer or post a comment and I'll edit it. Commented Jan 10, 2017 at 22:14
  • 1
    Found it! (kind of) – the entries of a directory are sorted before trying to load each one as either a package or module. This ensures packages are loaded first. Link to CPython source code Commented Jan 10, 2017 at 22:58

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