Python 3.10 support

[arieroos]

Hi all

I am running Python 3.10. I installed mqttwarn using pip install.

$ python --version
Python 3.10.4

However, when I try to generate the example config, I get:

$ mqttwarn make-config > mqttwarn.ini
Traceback (most recent call last):
  File "/opt/dotsys/dos/venv/bin/mqttwarn", line 5, in <module>
    from mqttwarn.commands import run
  File "/opt/dotsys/dos/venv/lib/python3.10/site-packages/mqttwarn/commands.py", line 15, in <module>
    from mqttwarn.core import bootstrap, connect, cleanup, run_plugin
  File "/opt/dotsys/dos/venv/lib/python3.10/site-packages/mqttwarn/core.py", line 5, in <module>
    from past.builtins import cmp
  File "/opt/dotsys/dos/venv/lib/python3.10/site-packages/past/builtins/__init__.py", line 43, in <module>
    from past.builtins.noniterators import (filter, map, range, reduce, zip)
  File "/opt/dotsys/dos/venv/lib/python3.10/site-packages/past/builtins/noniterators.py", line 24, in <module>
    from past.types import basestring
  File "/opt/dotsys/dos/venv/lib/python3.10/site-packages/past/types/__init__.py", line 25, in <module>
    from .oldstr import oldstr
  File "/opt/dotsys/dos/venv/lib/python3.10/site-packages/past/types/oldstr.py", line 5, in <module>
    from collections import Iterable
ImportError: cannot import name 'Iterable' from 'collections' (/usr/lib/python3.10/collections/__init__.py)

Stackoverflow answer are saying this because of Iterable being removed from collections in Python 3.10

Will you please consider supporting Python 3.10?

[amotl]

Dear Arie,

thank you for writing in. In general, mqttwarn should be compatible with Python up to version 3.11, as approved by CI.

1. There may be a hiccup on your system, what about upgrading the future package with pip install future --upgrade? It is always recommended to run such operations, also installing mqttwarn, within a Python virtualenv.
2. @jpmens and @sumnerboy12: In the long run, I think it would be a good idea to get rid of any need for the future package completely ¹, as mqttwarn now supports Python 3 only.

With kind regards,
Andreas.

---

P.S.: Within a newly created virtualenv, from past.builtins import cmp does not croak on my machine, even when using Python 3.10.

python3 -m venv .venv310
source .venv310/bin/activate
pip install future
python
>>> from past.builtins import cmp

Footnotes

1. https://github.com/jpmens/mqttwarn/blob/871a381f0793b3e086609ea55fb248c6be10743b/mqttwarn/core.py#L5 ↩

[arieroos]

Ah yes, it must be the future pacakge.

I had 0.17.1. This was fixed in 0.18.0: https://python-future.org/whatsnew.html#what-s-new-in-version-0-18-0-2019-10-09

https://github.com/jpmens/mqttwarn/blob/871a381f0793b3e086609ea55fb248c6be10743b/setup.py#L18
Could maybe change to 'future>=0.18.0,<1',
This change feels too small for a PR, but I'll make on if you think it's helpful.

[amotl]

Sweet that you have been able to fix the issue so quickly.

This change feels too small for a PR, but I'll make on if you think it's helpful.

Please do! ;]