classes.py 文件源码

def Call_isinstance(t, x):
    """Translate ``isinstance(foo, Bar)`` to ``foo instanceof Bar`` and
    ``isinstance(Foo, (Bar, Zoo))`` to ``foo instanceof Bar || foo instanceof
    Zoo``.

    AST dump of the latter::

      Call(args=[Name(ctx=Load(),
                      id='foo'),
                 Tuple(ctx=Load(),
                       elts=[Name(ctx=Load(),
                                  id='Bar'),
                             Name(ctx=Load(),
                                  id='Zoo')])],
           func=Name(ctx=Load(),
                     id='isinstance'),
           keywords=[])

    """
    if (isinstance(x.func, ast.Name) and x.func.id == 'isinstance'):
        assert len(x.args) == 2
        return _build_call_isinstance(x.args[0], x.args[1])