code: def _remove_bdb_context(evalue):
          
          removed_bdb_context = evalue
          while removed_bdb_context.__context__:
              ctx = removed_bdb_context.__context__
              if (
                  isinstance(ctx, AttributeError)
                  and ctx.__traceback__.tb_frame.f_code.co_name == "onecmd"
              ):
                  removed_bdb_context.__context__ = None
                  break
              removed_bdb_context = removed_bdb_context.__context__
docs: Remove exception context from Pdb from the exception.
  
          E.g. "AttributeError: 'Pdb' object has no attribute 'do_foo'",
          when trying to look up commands (bpo-36494).