Thought it might be good to have a centralized repository of the resources folks find useful to have on hand. Post cheat sheets, tutorials, whatever you find helps you do your thing! Both for stuff you still use and useful guides you’ve followed in the past.
Here’s some of mine.
Python Regular Expression cheat sheet: https://www.debuggex.com/cheatsheet/regex/python
Google’s guide to Regular Expressions in Python: https://developers.google.com/edu/python/regular-expressions
Data Cleaning in Python: http://www.analyticsvidhya.com/blog/2014/11/text-data-cleaning-steps-python/
Data Munging with Pandas: http://www.analyticsvidhya.com/blog/2014/09/data-munging-python-using-pandas-baby-steps-python/
NLTK guide: http://www.nltk.org/book/
Fuzzy sentence-matching in Python: http://bommaritollc.com/2014/06/fuzzy-match-sentences-python/