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Regular Expressions

Regular Expressions

Mar 03, 2015

This is a tool for composing regular expressions in PHP, Java, and Python: https://regex101.com/

  • The explanation pane on the top right of the page is the best way I have found to learn regular expression syntax.  

  • The code generator on the left hand menu will give you the proper syntax to import the "re" library and execute your regular expressions in Python.  

  • The tool is excellent for testing regular expressions on sample data sets, I was able to copy and paste a few sequences from my FASTA file and test the different amino acid motifs that I was trying to identify.