Passing float instead of integer to a function raises more likely TypeError instead of ValueError.

(see for example https://github.com/python/cpython/commit/f066bd94b9225a5a3c4ade5fc3ff81e3c49b7b32)

May be more interesting to switch to TypeError instead.

The code is nearly identical:

Sir, you are nitpicking here :'-)

Code golf version

Edit: 126 characters

You are not going to spoil that much with an example yielding 2 or 3, especially due to the meeting difficulty being linked to nested brackets.

Recursion limit is 1000 by default in Python.
Given this limit, in worst situation, this solution can generate numbers up to (1000 - 3) // 6 - 1 = 165 bits.

However Python has also an undocumented limit on nested parentheses when trying to eval a string which is 200 only.

Not all kata are designed for interview.
If you expect all solutions to be prod-ready, you are not on the right website.

Here is a suggestion to learn from this solution: you should ask for explanations politely.
It may bring you more insights than complaining.

Slower but less memory

When writing x * b'\0', if not mistaken, memset is used to set one unique value to multiples addresses.
The given value is directly written at the correct addresses, no intermediate values involved.

There is no need to repost a solution that is that similar to your previous one.
Codewars allows to create forks of your solution by clicking on Fork under your solution ;-)

Some insights about factorization function:

• It searches for the first factor dividing n.
• It returns a Counter with that factor and the rest of the factors are added recursively.
• First line is initialized with 2, 3 or 5: it is used to skip multiples of 2 or 3 afterwards.
• Main loop stops when q reaches sqrt(n): there is no new factor after this limit.
• d = 6-d is used to generate a 2,3-wheel that scans only only one third of all possible factors - factors with q % 6 in (1, -1).

More exactly it returns the left side if it is false-ish.
It is similar to the following:

return left and right
---------------------
if not left:
    return left
else:
    return right

It is called short circuit evaluation in Python and it is also available with or operator.

return left or right
---------------------
if left:
    return left
else:
    return right