I just tested some things in PyCharm. It has no problem with word_word or wordWord as variable names. It's even smart enough to flag just the non-word in word_a

I just tested some things in PyCharm. It has no problem with word_word or wordWord as variable names. It's even smart enough to flag just the non-word in word_ajsjasjasa. It will also put a squiggly under camelCaseWords in Python code by default, but that's because of PEP8 style rules, not spelling.