          """
          if isinstance(value, gdal.GDALRaster):
              return value
          elif is_candidate:
              with suppress(GDALException):
                  return gdal.GDALRaster(value)
          elif isinstance(value, dict):
              try:
                  return gdal.GDALRaster(value)
              except GDALException:
 
</s> remove             with suppress(KeyError):
 </s> add             try: </s> remove         with suppress(KeyError):
 </s> add         try:
            try:
          """
          if isinstance(value, gdal.GDALRaster):
              return value
          elif is_candidate:
            try:
                  return gdal.GDALRaster(value)
          elif isinstance(value, dict):
              try:
                  return gdal.GDALRaster(value)
              except GDALException:
keep keep keep keep replace keep keep keep keep keep
 Reverted "Fixed #27818 -- Replaced try/except/pass with contextlib.suppress()."

This reverts commit 550cb3a365dee4edfdd1563224d5304de2a57fda
because try/except performs better. 
django/contrib/gis/db/models/fields.py