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Python FAQ. Why does Python use indentation for grouping of statements? Python IndentationError: unexpected indent (How to Fix This Stupid Bug)
By Guest on 8th November 2022 01:17:32 AM | Syntax: PYTHON | Views: 133


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  1.  
  2. Why does Python use indentation for grouping of statements?
  3. ===========================================================
  4.  
  5. Guido van Rossum believes that using indentation for grouping is
  6. extremely elegant and contributes a lot to the clarity of the average
  7. Python program. Most people learn to love this feature after a while.
  8.  
  9. Since there are no begin/end brackets there cannot be a disagreement
  10. between grouping perceived by the parser and the human reader.
  11. Occasionally C programmers will encounter a fragment of code like
  12. this:
  13.  
  14.    if (x <= y)
  15.            x++;
  16.            y--;
  17.    z++;
  18.  
  19. Only the "x++" statement is executed if the condition is true, but the
  20. indentation leads many to believe otherwise.  Even experienced C
  21. programmers will sometimes stare at it a long time wondering as to why
  22. "y" is being decremented even for "x > y".
  23.  
  24. Because there are no begin/end brackets, Python is much less prone to
  25. coding-style conflicts.  In C there are many different ways to place
  26. the braces. After becoming used to reading and writing code using a
  27. particular style, it is normal to feel somewhat uneasy when reading
  28. (or being required to write) in a different one.
  29.  
  30. Many coding styles place begin/end brackets on a line by themselves.
  31. This makes programs considerably longer and wastes valuable screen
  32. space, making it harder to get a good overview of a program.  Ideally,
  33. a function should fit on one screen (say, 20--30 lines).  20 lines of
  34. Python can do a lot more work than 20 lines of C.  This is not solely
  35. due to the lack of begin/end brackets -- the lack of declarations and
  36. the high-level data types are also responsible -- but the indentation-
  37. based syntax certainly helps.
  38.  
  39. Python IndentationError: unexpected indent (How to Fix This Stupid Bug)
  40. https://www.youtube.com/watch?v=ceDih3Mb5yE
  41.  
  42. Also see:
  43. Should you use TABS or SPACES for indentation in Python?
  44. https://www.youtube.com/watch?v=hCLf6cNYnCk
  45.  
  46. [embed]
















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