12. Introduction to Python regular expressions

In this section, we give a brief introduction to Python regular expressions.

Regular expressions are expressions that define sets of strings by defining a pattern common to all members of the set.

• 12.1. Regular expression language
  • 12.1.1. Python for Google developers: Regular expression lesson
  • 12.1.2. Basics
  • 12.1.3. Advice
• 12.2. Regular expression functions and methods
  • 12.2.1. Regular expression objects
  • 12.2.2. Match objects
• 12.3. Regular expression examples
  • 12.3.1. Crossword puzzle solving
  • 12.3.2. Textonyms (requires NLTK)
  • 12.3.3. Matching card hands (from the Python library page for REs)
• 12.4. Regular Expression Assignment Practice Lab
  • 12.4.1. How to construct and debug regular expressions
  • 12.4.2. Solving crosswords (requires NLTK)
  • 12.4.3. Textonyms
  • 12.4.4. Regular expression practice
  • 12.4.5. An example that requires NLTK to be installed
  • 12.4.6. Poker examples
  • 12.4.7. Questions
  • 12.4.8. How to do extraction
  • 12.4.9. Tokenization (NLTK assumed)
  • 12.4.10. Sentence boundary detection
  • 12.4.11. Putting it all together
  • 12.4.12. Example of using regular expressions to clean data