DeprecationWarning on usage of imp in loader.py

[milliams]

When running my test suite which uses invoke (via fabric) I see:

======================= warnings summary ========================
venv/lib64/python3.7/site-packages/invoke/loader.py:3
  venv/lib64/python3.7/site-packages/invoke/loader.py:3: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
    import imp

-- Docs: https://docs.pytest.org/en/latest/warnings.html
========== 6 passed, 1 warnings in 1651.00s (0:27:30) ===========

The used parts of the imp module have been deprecated since Python 3.3 and the replacement importlib has been available since Python 3.1.

[SwampFalc]

For what it's worth, there's a workaround that will suppress that one particular warning. I use it on pytest but I believe it's going to be mostly the same with other test frameworks:

-W ignore::DeprecationWarning:invoke.loader

[rupertnash]

I have also spotted this - the question is really: which versions of python is invoke committed to supporting? The docs say 2.7 and >=3.4. However, we have now passed 2020-01-01, so the sun has officially gone down on python 2. If I had a vote (which I don't obviously), it would be to drop support for 2.7 and switch this code to importlib

Instead I'm adding a warning filter (https://docs.pytest.org/en/latest/warnings.html#pytest-mark-filterwarnings) and have logged an issue on our project.

[shoriminimoe]

This issue was brought up again in #829. I would be happy to submit a PR if the team is looking for help.

[neozenith]

Hi,
I'm starting to help out on issue triage. Invoke (and the Fabric and Paramiko family) are conservative with the supported versions of python.

But yes, very soon Python2 will be dropped clearing out issues such as this.
https://bitprophet.org/projects/#roadmap

[MarcSkovMadsen]

Listening in as I also see this warning.

[skapin]

2022, still here ...... 🧟

[sodul]

This will break in python 3.12:

DeprecationWarning: the imp module is deprecated in favour of importlib and slated for removal in Python 3.12; see the module's documentation for alternative uses

May I suggest the use of a conditional import based on the python version? This would address the warnings will ensuring forward compatibility with Python 3.12.

I'm not very fond of silencing the warning since it is very legitimate.

[kuwv]

#919

[bitprophet]

#919 merged and released in Invoke 2.1.0 today. Thanks!

[kuwv]

The imp dependency has been replaced. Can you verify what version you are using?