parameters: (obj)
return_statement: return True
docstring: Parameters
      ----------
      `obj` - the object to be checked
  
      Returns
      -------
      validator - returns True if object is callable
          raises ValueError otherwise.
function: def is_callable(obj):
      """
  
      Parameters
      ----------
      `obj` - the object to be checked
  
      Returns
      -------
      validator - returns True if object is callable
          raises ValueError otherwise.
  
      """
      if not callable(obj):
          raise ValueError("Value must be a callable")
      return True
function_tokens: def is_callable ( obj ) : if not callable ( obj ) : raise ValueError ( "Value must be a callable" ) return True