Added get_tariffs to pull kWh based tariffs from Eloverblik.

[runemoennike]

Supports JonasPed/homeassistant-eloverblik#51 by adding a function to pull out "tariffs" from Eloverblik.

Note that I have not added support for subscriptions and "fees". I do not know what "fees" are (as opposed to "tariffs") and the data returned for my meter has no entries in this array, and my googling was futile. As for subscriptions, I'm currently interested in adding support for calculating the price per kWh used, so it's not interesting to me at the moment. It should be easy to add for anyone interested by adding a new parser function.

[JonasPed]

Thanks. Will take a look at it in a few days.

[JonasPed]

I just tried to checkout the PR and run the module and get below error.

Is something missing in the PR?

Traceback (most recent call last):
  File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/home/jonas-privat/development/pyelovervlik/pyeloverblik/pyeloverblik/__main__.py", line 66, in <module>
    main()
  File "/home/jonas-privat/development/pyelovervlik/pyeloverblik/pyeloverblik/__main__.py", line 49, in main
    result = Eloverblik(args.refresh_token).get_fees(args.metering_point)
AttributeError: 'Eloverblik' object has no attribute 'get_fees'

[runemoennike]

Looks like a had forgotten to change that call when I renamed it to match the API. I've pushed a change where it's fixed.

[JonasPed]

I will see if I can pack a new release within this week.