Unmatched css selector, and invalid regex in codebase

The exception message given is not very clear; I recommend making it clear.

    raise Exception("No match was found. We're done or something is broken")

I used the debugger to extract the failing css selector:

.my-class table tr:nth-child(2n) does not match the regex'([_0-9a-zA-Z-#.:*"\'\[\\]=]+)$ (This expression doesn't compile in my regex tools. The closest working regexp I could come to is:[_0-9a-zA-Z\-#.:*"\'\[\]=]+$).

I find that the regex is missing parenthesis captures.

With \(\) added the working regex expression does match the selector.

Suggested change the regexp here to:
pynliner/soupselect.py:98 [_0-9a-zA-Z\-#.:*"\'\[\]\(\)=]+$

[rennat]

Yeah this error should be better.

As far as the :nth-child() pseudo selector, pynliner currently doesn't support any pseudo selectors that take arguments. It's simply not smart enough yet 😞