Comment by PyComfy

ah sorry. i did

    import dis
    dis.dis("a = foo.bar(b)")

which gave

    1           0 LOAD_NAME                0 (foo)
                2 LOAD_ATTR                1 (bar)
                4 LOAD_NAME                2 (b)
                6 CALL_FUNCTION            1
                8 STORE_NAME               3 (a)
               10 LOAD_CONST               0 (None)
               12 RETURN_VALUE