note that any non-integers, including non-number types, are not triangle numbers

In Python, bool is an integer type:

isinstance(True, int) => True

I think that tests using bool should either expect True, or be removed for this language.

Sure thing!

Test framework update

Old test framework was only used in sample tests btw. I mostly just copied fixed tests there.

Test framework update

This test is incorrect from grammar perspective:

test.assert_equals(num_to_russian('1000'), "тысяч")

In Russian, тысяча is short for одна тысяча. Just as with одна целая, when talking about one of something, you have to consider gender. Interestingly, 1 000 is feminine, 1 000 000, 1 000 000 000 and onwards are masculine.

Acceptable versions:

test.assert_equals(num_to_russian('1000'), "одна тысяча")
test.assert_equals(num_to_russian('1000'), "тысяча")

Fixed (8 years later :D)

Fixed

Fixed

Upd:

• Added print_tree function and smaller random tests to simplify debugging issue

Concerning the random tests issue, in the current version the "positive" tests generate giant all-male family trees that contain lots of seventh sons for obvious reasons. This allows many invalid solutions to pass tests.

On the contrast, the new random tests generate familty trees where seventh sons of a seventh son appear somewhere in the tree, often behind a female anscestor.

• Test framework updated
• The Python-specific part about json module made visible only for Python
• Solution setup: import json added, formatting updated
• Preloaded cleaned up issue
• Random tests rewritten issue

The tests are fine, just solved it. As some other 14000 people before me.

Codewars kata are rigorously tested by multiple users, 99% of the time you can be sure the problem is not in the tests.

You can use print() to print any data you need to stdout.

What exactly would you change?