Hát, "python-szerűnek" tűnik, de nem tűnik "Python 3.4" kompatibilisnek.
$ python3
>>> a = [10, 20, 30, 40]
>>> del a[0:4:2]
>>> print(a)
[20, 40]
micropython-1.15/ports/unix$ ./micropython
MicroPython v1.15 on 2021-06-07; linux version
Use Ctrl-D to exit, Ctrl-E for paste mode
>>> a = [10, 20, 30, 40]
>>> del a[0:4:2]
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NotImplementedError: