Python 3.8 and __init__.py in views directory

[Sydo Luciani]

No problem with python 3.5 environment, but missing views/__init__.py, throws below errors in Python 3.8.

Even including relative path to view module in config.scan('.module_name/views/view_module') has no effect.

Error starts with:

pyramid.httpexceptions.HTTPNotFound: The resource could not be found.
During handling of the above exception, another exception occurred:

And trace ends with:

  File "/usr/lib/python3.8/posixpath.py", line 152, in dirname
    p = os.fspath(p)

Is it by design ?

[Michael Merickel]

Sorry can you give more context? Did you delete the __init__.py in your views folder? If so, I would expect some issues.

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[Sydo Luciani]

Yes, I was missing __init__.py in views folder, but didn't have any problem while working in Python 3.5 environment,

error started when switched to Python 3.7 and Python 3.8, and creating __init__ fixed the issue.

The different behavior brought up curiosity.

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[Jonathan Vanasco]

Stuff like this often happens because Python has a compiled/cached version. Under Python2,  `.pyc` files were in the same directory as the `.py` file ; under Python3 they are in a `__pycache__` directory and versioned to the interpreter.

you probably had a `views/__pycache__/__init__.cpython-35.pyc` file, which python 3.5 picked up but 3.7 and 3.8 will not.

[Sydo Luciani]

Sorry, no , after deleting __pycache__ and reinstalling app using pip install -e .

it worked with Python 3.5 but not with python 3.8.

p = os.fspath(p)
TypeError: expected str, bytes or os.PathLike object, not NoneType

Probably not important since recreating __init__.py fixes the problem

but apparently something has changed since Python 3.6.