parameters: (tensor, obj)
return_statement: return _callable_const(F.typeof(obj))
docstring: Returns True if `obj` is a function.
docstring_summary: Returns True if `obj` is a function.
docstring_tokens: Returns True if obj is a function .
function: def _callable(tensor, obj):
      """Returns True if `obj` is a function."""
      if F.isconstant(tensor):
          return isinstance(obj, types.FunctionType)
      return _callable_const(F.typeof(obj))
function_tokens: def _callable ( tensor , obj ) : if F . isconstant ( tensor ) : return isinstance ( obj , types . FunctionType ) return _callable_const ( F . typeof ( obj ) )