Python: Do This, Not That! Logo
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Contents

  • 1. Collection initialization
  • 2. Chained comparison operators
  • 3. Falsy and truthy
  • 4. Ternary operator
  • 5. Looping over a range of numbers
  • 6. Looping backward
  • 7. Looping over a collection
  • 8. Looping over a collection with indices
  • 9. Looping over two collections
  • 10. Use list comprehensions
  • 11. Filtering a list
  • 12. Most frequent item in list
  • 13. Default dictionary values: defaultdict
  • 14. Accessing a dictionary value with a default value
  • 15. Updating dictionaries
  • 16. Merging dictionaries
  • 17. Using a dictionary to store counts
  • 18. Dictionary comprehension
  • 19. Set comprehension
  • 20. Unpacking sequences and tuples
  • 21. Ignoring unpacked values from a tuple
  • 22. Avoid accessing tuple elements by index
  • 23. String concatenation
  • 24. String interpolation
  • 25. String debug
  • 26. Don’t repeat yourself (DRY)
  • 27. String reversal
  • 28. Clarify function calls with keyword arguments
  • 29. Lambdas
  • 30. Generator functions
  • 31. New vs old classes
  • 32. Classes and dunders (double underscores)
  • 33. Enumerations
  • 34. Transforming data with map, filter, reduce
  • 35. Flattening data
  • 36. Caching data and results
  • 37. Reading a file
  • 38. Deleting a file
  • 39. Filtering files
  • 40. Saving objects to file
  • 41. Combinations of a list
  • 42. Cycling through a list
  • 43. Product of lists
  • 44. Simultaneous state updates
  • 45. Pandas apply and numpy vectorization
Python: Do This, Not That!
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