django1/django/contrib/gis/geos/error.py

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"""
This module houses the GEOS exceptions, specifically, GEOSException and
GEOSGeometryIndexError.
"""
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class GEOSException(Exception):
"The base GEOS exception, indicates a GEOS-related error."
pass
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class GEOSIndexError(GEOSException, KeyError):
"""
This exception is raised when an invalid index is encountered, and has
the 'silent_variable_feature' attribute set to true. This ensures that
django's templates proceed to use the next lookup type gracefully when
an Exception is raised. Fixes ticket #4740.
"""
# "If, during the method lookup, a method raises an exception, the exception
# will be propagated, unless the exception has an attribute
# `silent_variable_failure` whose value is True." -- Django template docs.
silent_variable_failure = True