Look at my solution to see what I mean

Do you mean that the group that I can't use the group found again?

Would you clarify for me what you mean by this?

I still encounter this problem.

"The bit size must be a power of 2 greater than or equal to 8." is not currently being tested, and there are some answers that just require it to be a multiple of 8.

You commented out the first occurrence but not the second occurrence.

The description says:

We can assume that each attribute has its copy constructor implemented.

But a.u is an instance of the class U which does not have a copy constructor.

This also implies that we should copy the attributes when getattr is called, but the it_5 tests don't follow this, in particular with this test:

a.u.x += 8

If I actually copy the attributes, I fail this test.

(I would also like to bring attention to this unresolved issue from 4 years ago, which also caused me some frustration.)

test.expect(default2 > now2 > default > now, msg)
TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'

Where so? in the samplet tests, I guess? Then you're(were) using an outdated version of the sample tests: I commented out that test in both the sample tests and the full test suite ages ago.

I want to continue this discussion.

I also kept getting the same error:

    test.expect(default2 > now2 > default > now, msg)
TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'

And after expanding the further comments, it is revealed that the test contains:

field2 = DateTimeField(auto_now=True, blank=True)
default = field2.default

This feels out of scope, since DateTimeField shouldn't be accessed outside a class. I had to put in extra hacks in my solution to get this to work.

Description says "Only positives integers will be used", yet 0 is generated sometimes.

I wanted to do something like this but with split... And here i see what i searched, thx ! group in regex is very powerful

Just like mine, but quite a bit more concise. Well done.

It is concise and easy to read, and if you want the negative lookbehind assertion, like I did, it seems simpler.

I really need to learn RegEx