feat: Add InfluxLoggingHandler to use the InfluxClient in python native logging

[strom-und-spiele]

Closes #364

Sample

import logging
from influxdb_client import InfluxLoggingHandler
handler = InfluxLoggingHandler(url="…", token="…", org="…", bucket="…")
handler.setLevel(logging.DEBUG)
influx_logger = logging.getLogger('…')
influx_logger.setLevel(logging.DEBUG)
influx_logger.addHandler(handler)
influx_logger.debug("mem,host=host1 used_percent=23.43234543")

Checklist / TODO

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• pytest tests completes successfully
• Commit messages are in semantic format
• Sign CLA (if not already signed)
• sample usage in /examples/

Possible improvement

• should the connection be checked on init?
• should the logger behave on errors (e.g. buffer till a connection can be reestablished)?

[bednar]

@strom-und-spiele Thanks for the PR 👍 and I'm waiting to see what comes next.

Please convert your PR to draft state if you are not ready to review.

[codecov-commenter]

Codecov Report

Merging #405 (1e10cee) into master (62a0ba1) will increase coverage by 0.05%.
The diff coverage is 97.22%.

@@            Coverage Diff             @@
##           master     #405      +/-   ##
==========================================
+ Coverage   93.26%   93.31%   +0.05%     
==========================================
  Files          28       29       +1     
  Lines        2509     2544      +35     
==========================================
+ Hits         2340     2374      +34     
- Misses        169      170       +1     

Impacted Files	Coverage Δ
influxdb_client/client/write/point.py	96.73% <80.00%> (-0.59%)	⬇️
influxdb_client/__init__.py	100.00% <100.00%> (ø)
influxdb_client/client/loggingHandler.py	100.00% <100.00%> (ø)

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[strom-und-spiele]

class printablePoint(Point):
    def __str__(self):
        return f"self.get_line_protocol()"

Using a printablePoint makes logging with most other handlers (like logging to files and stdout) useful (the actual data is logged instead of the __repr__ of Point).
Is there anything that speaks agains adding an implementation of __str__ to the Point class and making this work out of the box?

[bednar]

Is there anything that speaks agains adding an implementation of str to the Point class and making this work out of the box?

It sounds reasonable, so feel free to add __str__ to the Point.

I'm a little worried about user confusion about this PR. Can you please mention in the PR title and documentation that it is about using client as a LoggingHandler and not implement native logging into client (it is already there).

[bednar]

Thanks again for your PR 👍

There are a few requirements that must be be satisfy before we accept the PR:

[bednar]

Thanks for your PR, everything looks good 👍

LGTM

[strom-und-spiele]

Thanks for your PR, everything looks good +1

LGTM

Thanks reviewing. 🥇