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76 lines
2.0 KiB
76 lines
2.0 KiB
from ._common import pytz_imported
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class PytzUsageWarning(RuntimeWarning):
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"""Warning raised when accessing features specific to ``pytz``'s interface.
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This warning is used to direct users of ``pytz``-specific features like the
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``localize`` and ``normalize`` methods towards using the standard
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``tzinfo`` interface, so that these shims can be replaced with one of the
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underlying libraries they are wrapping.
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"""
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class UnknownTimeZoneError(KeyError):
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"""Raised when no time zone is found for a specified key."""
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class InvalidTimeError(Exception):
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"""The base class for exceptions related to folds and gaps."""
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class AmbiguousTimeError(InvalidTimeError):
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"""Exception raised when ``is_dst=None`` for an ambiguous time (fold)."""
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class NonExistentTimeError(InvalidTimeError):
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"""Exception raised when ``is_dst=None`` for a non-existent time (gap)."""
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PYTZ_BASE_ERROR_MAPPING = {}
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def _make_pytz_derived_errors(
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InvalidTimeError_=InvalidTimeError,
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AmbiguousTimeError_=AmbiguousTimeError,
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NonExistentTimeError_=NonExistentTimeError,
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UnknownTimeZoneError_=UnknownTimeZoneError,
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):
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if PYTZ_BASE_ERROR_MAPPING or not pytz_imported():
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return
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import pytz
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class InvalidTimeError(InvalidTimeError_, pytz.InvalidTimeError):
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pass
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class AmbiguousTimeError(AmbiguousTimeError_, pytz.AmbiguousTimeError):
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pass
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class NonExistentTimeError(
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NonExistentTimeError_, pytz.NonExistentTimeError
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):
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pass
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class UnknownTimeZoneError(
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UnknownTimeZoneError_, pytz.UnknownTimeZoneError
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):
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pass
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PYTZ_BASE_ERROR_MAPPING.update(
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{
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InvalidTimeError_: InvalidTimeError,
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AmbiguousTimeError_: AmbiguousTimeError,
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NonExistentTimeError_: NonExistentTimeError,
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UnknownTimeZoneError_: UnknownTimeZoneError,
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}
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)
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def get_exception(exc_type, msg):
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_make_pytz_derived_errors()
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out_exc_type = PYTZ_BASE_ERROR_MAPPING.get(exc_type, exc_type)
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return out_exc_type(msg)
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