Fix DST days in ES parser

[silimotion]

Issue

While working on something else, I detected that the ES parser failed for some seemingly random dates. Upon closer inspection, I discovered that this happened because of a failure in the parsing of some dates:

ValueError: Invalid isoformat string: '2020-10-25 1A:00'

Apparently, the REE endpoint uses a strange format to distinguish the repeated hours during DST end days. It seemed quite unusual and I could not find it anywhere, so I built a parser for it.

Preview

An excerpt of the output from the parser after the changes:

 {'correctedModes': [],
  'datetime': datetime.datetime(2020, 10, 25, 0, 55, tzinfo=zoneinfo.ZoneInfo(key='Atlantic/Canary')),
  'production': {'oil': 2.2, 'solar': 0.0, 'wind': 7.8},
  'source': 'demanda.ree.es',
  'sourceType': <EventSourceType.measured: 'measured'>,
  'storage': {'hydro': 4.5},
  'zoneKey': 'ES-CN-HI'},
 {'correctedModes': [],
  'datetime': datetime.datetime(2020, 10, 25, 1, 0, tzinfo=datetime.timezone(datetime.timedelta(seconds=3600))),
  'production': {'oil': 2.9, 'solar': 0.0, 'wind': 6.8},
  'source': 'demanda.ree.es',
  'sourceType': <EventSourceType.measured: 'measured'>,
  'storage': {'hydro': 4.4},
  'zoneKey': 'ES-CN-HI'},
[...]
 {'correctedModes': [],
  'datetime': datetime.datetime(2020, 10, 25, 1, 0, tzinfo=datetime.timezone.utc),
  'production': {'oil': 3.3, 'solar': 0.0, 'wind': 2.9},
  'source': 'demanda.ree.es',
  'sourceType': <EventSourceType.measured: 'measured'>,
  'storage': {'hydro': 1.1},
  'zoneKey': 'ES-CN-HI'},

Behaviour in other parsers

I looked for similar wrong behaviour during these dates in other parsers, in general the situation is quite a mess. In ESIOS and CY parsers it seems the endpoints themselves don't report data for 1 hour. It would be nice if someone with EIA and ENTSOE keys could tests those parsers. Many other parsers only work in realtime so they could not be tested.

Double check

• I have tested my parser changes locally with poetry run test_parser "zone_key"
• I have run pnpx prettier@2 --write . and poetry run format in the top level directory to format my changes.

[VIKTORVAV99]

Looks good as far as I can tell but could we get a test for this as well so we don't break it in the future?

[VIKTORVAV99]

LGTM! 🎉

Thanks for adding the test!