You cannot "import typing" in Python 3.10 when testing.

Error below:
Traceback (most recent call last):
File "/workspace/default/tests.py", line 2, in
File "/workspace/default/solution.py", line 2, in
File "/workspace/default/preloaded.py", line 11, in
File "", line 1027, in _find_and_load
File "", line 1002, in _find_and_load_unlocked
File "", line 945, in _find_spec
File "/workspace/default/.venv/lib/python3.10/site-packages/_distutils_hack/init.py", line 88, in find_spec
TypeError: str.format() argument after ** must be a mapping, not int

Is there a limited, unlimited, or undefined number of vars allowed to be defined?

Looks like I submitted this accidentally without refactoring (hence allot of debug code). I'll fork it soon. (Edit: forked.)

The first line provided is: f=_=>

Does this violate the only-one-char-per-line rule or is it an exception?

On the Python version, I am very confused about what the return type of parseRegExpr should be. Are we returning ASTs? Are we matching a regex? Are we transpiling from one regex flavor to another as noted by the testcase of shouldBe("a|b", "(a|b)")? The kata details is missing a section about the statement returned, and only mentions that invalid regexes return "".

I'm looking at the basic tests and I think it converts the returned value into a string, then compares it to the second "shouldBe" argument. Should there be a __str__ implementation in the AST nodes that converts an Any() as a "." for example?

My current implementation is returning the AST.

Did anyone get it?

This just made my day. Might try something like this sometime!

I like the parser-like rules approach and minimal boilerplate. Nice job using only 2 headers!

Good Kata! A C++ version would be nice.

Nevermind, as far as I can see, only one function is needed.

Is the input program one-function or multi-function? For example, is "[ a b ] a + b [ x y ] x * y" possible input or is only one match for the "function" rule allowed? I am not seeing any explicit indication of this in the description.