[New-bugs-announce] [issue26344] `sys.meta_path` Skipped for Packages with Non-Standard Suffixed `__init__` Files

Wolfgang Richter report at bugs.python.org
Thu Feb 11 17:39:43 EST 2016


New submission from Wolfgang Richter:

My understanding of `sys.meta_path` is that it is supposed to allow customized loading of Python modules and packages.

In fact the `importlib` machinery appears to have support for identifying packages with `__init__` files with non-standard suffixes:

https://github.com/python/cpython/blob/master/Lib/importlib/_bootstrap_external.py#L645

https://github.com/python/cpython/blob/master/Lib/importlib/_bootstrap_external.py#L1233

However, I find that when I `import wolftest` inside a folder with structure:

./
    /wolftest
        /__init__.wolf
        /something.wolf

None of my sys.meta_path finders are called at all, and instead a namespace is returned.

I was wondering why the `import` statement appears to short-circuit and not check with `sys.meta_path` handlers in this case?

----------
components: Library (Lib)
files: PyMetaPath.tar.gz
messages: 260138
nosy: Wolfgang Richter
priority: normal
severity: normal
status: open
title: `sys.meta_path` Skipped for Packages with Non-Standard Suffixed `__init__` Files
type: behavior
versions: Python 3.4
Added file: http://bugs.python.org/file41902/PyMetaPath.tar.gz

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<http://bugs.python.org/issue26344>
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