ok

    if len(observed) == 1:
        pass

Why those lines? That's why your code fails the first sample test. Not a kata issue. Removed your other posts.

Please don't create 4 (!) separate messages for the same question, as it makes it hard for other users to reply in one place.

Also the mods are going to tell you to remove Issue tag on both (!) of your messages, as there is no issue with the kata for the time being, you just have to troubleshoot your code.

As for your problem, it's hard to say without seeing your code - if I had to guess, maybe you are iterating twice over a generator without realising it.

Run the following in your IDE:

gen = (x for x in range(5))
print(max(gen))
print(min(gen))

and notice what happens when you try to make use of gen the second time.

Now check your code for similar error - that you aren't making use of any generator twice before returning.

Also, as usual - print the input just to make sure you understand which tests you are failing on.

And yeah, I am returning instead of printing, so why is it not working?

Traceback (most recent call last):
File "tests.py", line 18, in
test.assert_equals(sorted(get_pins(tup[0])), sorted(tup[1]), 'Come on, detective! You can do it better! These are not the PIN variations for "' + tup[0] + '"')
TypeError: 'NoneType' object is not iterable

Its also giving me this error for no reason. Can someone please help me?

read this:https://docs.codewars.com/training/troubleshooting/

nobody can help you if you don't provide the language/failing test/code snippet

if you are posting code, flag it as spoiler content

if you want to see the input of the test, you can print it to the console

happening with me too lol idk whats wrong

can someone please help me out with my code, I am not understanding whats going worng with it and cant even see the type of tests being performed so i have no idea whats wrong with my code. Please