code: def __str__(self):
      return 'RangeDim(lower_bound={}, upper_bound={}, default={}, symbol="{}")'.format(
          self.lower_bound, self.upper_bound, self.default, self.symbol
      )
  
imports: from enum import Enum
  from typing import Optional
  import numpy
  from coremltools.converters.mil.mil import types
  from coremltools.converters.mil.mil.types.symbolic import is_symbolic
  from coremltools.converters.mil.mil.types.type_mapping import is_builtin, numpy_type_to_builtin_type
label_desc: Use image node_id 3 for calling the RangeDim obj's underlying member method code with example usage: obj.__str__() and returns: str