code: def _cast_to_type_if_compatible(name, param_type, value):
    
    fail_msg = (
        "Could not cast hparam '%s' of type '%s' from value %r" %
        (name, param_type, value))
  
    # Some callers use None, for which we can't do any casting/checking. :(
    if issubclass(param_type, type(None)):
      return value
  
    # Avoid converting a non-string type to a string.
    if (issubclass(param_type, (six.string_types, six.binary_type)) and
        not isinstance(value, (six.string_types, six.binary_type))):
      raise ValueError(fail_msg)
  
    # Avoid converting a number or string type to a boolean or vice versa.
    if issubclass(param_type, bool) != isinstance(value, bool):
      raise ValueError(fail_msg)
  
    # Avoid converting float to an integer (the reverse is fine).
    if (issubclass(param_type, numbers.Integral) and
        not isinstance(value, numbers.Integral)):
      raise ValueError(fail_msg)
  
    # Avoid converting a non-numeric type to a numeric type.
    if (issubclass(param_type, numbers.Number) and
        not isinstance(value, numbers.Number)):
      raise ValueError(fail_msg)
  
    return param_type(value)
docs: Cast hparam to the provided type, if compatible.
  
    Args:
      name: Name of the hparam to be cast.
      param_type: The type of the hparam.
      value: The value to be cast, if compatible.
  
    Returns:
      The result of casting `value` to `param_type`.
  
    Raises:
      ValueError: If the type of `value` is not compatible with param_type.
        * If `param_type` is a string type, but `value` is not.
        * If `param_type` is a boolean, but `value` is not, or vice versa.
        * If `param_type` is an integer type, but `value` is not.
        * If `param_type` is a float type, but `value` is not a numeric type.