oncall-engine/engine/common/timezones.py

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import pytz
from common.api_helpers.exceptions import BadRequest
def is_valid_timezone(timezone: str):
try:
return pytz.timezone(timezone)
except pytz.UnknownTimeZoneError:
return False
def raise_exception_if_not_valid_timezone(timezone, exception_class=BadRequest):
"""
Like `is_valid_timezone` but throws specified "exception_class" class
(default `common.api_helpers.exceptions.BadRequest`) if not a valid timezone.
**NOTE**: if `exception_class` is provided, it should take a `detail` kwarg in its constructor
"""
if not is_valid_timezone(timezone):
raise exception_class(detail="Invalid timezone")