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Work around pytz tzname bug

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Fixes https://github.com/esphome/issues/issues/445
This commit is contained in:
Otto Winter 2019-07-03 17:13:40 +02:00
parent c6512013bb
commit 85195436c1
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1 changed files with 12 additions and 1 deletions
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13
esphome/components/time/__init__.py
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@ -2,6 +2,7 @@ import bisect
import datetime
import logging
import math
import string
import pytz
import tzlocal
@ -52,8 +53,18 @@ def _tz_dst_str(dt):
_tz_timedelta(td))
def _non_dst_tz(tz, dt):
def _safe_tzname(tz, dt):
tzname = tz.tzname(dt)
# pytz does not always return valid tznames
# For example: 'Europe/Saratov' returns '+04'
# Work around it by using a generic name for the timezone
if not all(c in string.ascii_letters for c in tzname):
return 'TZ'
return tzname
def _non_dst_tz(tz, dt):
tzname = _safe_tzname(tz, dt)
utcoffset = tz.utcoffset(dt)
_LOGGER.info("Detected timezone '%s' with UTC offset %s",
tzname, _tz_timedelta(utcoffset))