  
  class GEOSGeometry(GEOSBase, ListMixin):
      "A class that, generally, encapsulates a GEOS geometry."
  
      # Raise GEOSIndexError instead of plain IndexError
      # (see ticket #4740 and GEOSIndexError docstring)
      _IndexError = GEOSIndexError
      _GEOS_CLASSES = None
  
      ptr_type = GEOM_PTR
      has_cs = False  # Only Point, LineString, LinearRing have coordinate sequences
  
 
</s> remove 
    class _IndexError:
        The type of exception to be raise on invalid index [Optional]
 </s> add  </s> remove     _IndexError = IndexError
 </s> add  </s> remove 

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
 </s> add  </s> remove from django.contrib.gis.geos.error import GEOSIndexError
 </s> add  </s> remove """
 This module houses the GEOS exceptions, specifically, GEOSException and
 GEOSGeometryIndexError.
"""


 </s> add 
  
  class GEOSGeometry(GEOSBase, ListMixin):
      "A class that, generally, encapsulates a GEOS geometry."
  



      _GEOS_CLASSES = None
  
      ptr_type = GEOM_PTR
      has_cs = False  # Only Point, LineString, LinearRing have coordinate sequences
  
keep keep keep keep replace replace replace keep keep keep keep keep
 Fixed #25225 -- Simplified code to remove GEOSIndexError

The test is a regression for refs #4740 to show that the original
fix of GEOSIndexError is no longer needed. 
django/contrib/gis/geos/geometry.py