parameters: (op)
return_statement: return op in _VARIABLE_OPS
docstring: Returns true if 'op' refers to a Variable node.
docstring_summary: Returns true if 'op' refers to a Variable node.
docstring_tokens: Returns true if op refers to a Variable node .
function: def _is_variable_op(op):
    """Returns true if 'op' refers to a Variable node."""
    return op in _VARIABLE_OPS
function_tokens: def _is_variable_op ( op ) : return op in _VARIABLE_OPS