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Fix sensor statistics collection with empty states (#52393)

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This commit is contained in:
Erik Montnemery
2021-07-01 14:53:03 +02:00
committed by Franck Nijhof
parent eea544d2d2
commit 4959561bde
1 changed files with 3 additions and 1 deletions
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4
homeassistant/components/sensor/recorder.py
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@@ -161,13 +161,15 @@ def _normalize_states(
entity_history: list[State], device_class: str, entity_id: str
) -> tuple[str | None, list[tuple[float, State]]]:
"""Normalize units."""
unit = None
if device_class not in UNIT_CONVERSIONS:
# We're not normalizing this device class, return the state as they are
fstates = [
(float(el.state), el) for el in entity_history if _is_number(el.state)
]
unit = fstates[0][1].attributes.get(ATTR_UNIT_OF_MEASUREMENT)
if fstates:
unit = fstates[0][1].attributes.get(ATTR_UNIT_OF_MEASUREMENT)
return unit, fstates
fstates = []