Update README.md

Author: khuyentran1401

README.md

@@ -149,6 +149,7 @@ git clone https://github.com/khuyentran1401/Data-science
  | Build a Robust Conversational Assistant with Rasa | [🔗](https://towardsdatascience.com/build-a-conversational-assistant-with-rasa-b410a809572d) | [🔗](https://github.com/khuyentran1401/Data-science/tree/master/nlp/conversational_rasa)
  | I Analyzed 2k Data Scientist and Data Engineer Jobs and This is What I Found | [🔗](https://pub.towardsai.net/i-analyzed-2k-data-scientist-and-data-engineer-jobs-and-this-is-what-i-found-1ed37f98a704) | [🔗](https://github.com/khuyentran1401/Data-science/tree/master/nlp/diffbot_examples)
 | Checklist — Behavioral Testing of NLP Models | [🔗](https://towardsdatascience.com/checklist-behavioral-testing-of-nlp-models-491cf11f0238) | [🔗](https://github.com/khuyentran1401/Data-science/blob/master/nlp/checklist/checklist_examples.ipynb)
+| PRegEx: Write Human-Readable Regular Expressions in Python | [🔗](https://towardsdatascience.com/pregex-write-human-readable-regular-expressions-in-python-9c87d1b1335) | [🔗](https://github.com/khuyentran1401/Data-science/blob/master/productive_tools/pregex.ipynb)
 
 # Computer Vision