Sort list of lists ascending and then descending

by 
L = [['a',1], ['a',2], ['a',3], ['b',1], ['b',2], ['b',3]]
L.sort(key=lambda k: (k[0], -k[1]), reverse=True)

L now contains:

[['b', 1], ['b', 2], ['b', 3], ['a', 1], ['a', 2], ['a', 3]]

More Related Contents:

  1. How to keep keys/values in same order as declared?
  2. How can I sort a dictionary by key?
  3. How to sort a list/tuple of lists/tuples by the element at a given index?
  4. How to correctly sort a string with a number inside? [duplicate]
  5. Pythonic way to check if a list is sorted or not
  6. How to sort a list of tuples according to another list
  7. How to sort objects by multiple keys?
  8. pandas groupby, then sort within groups
  9. Why does my Pandas DataFrame not display new order using `sort_values`?
  10. How to use a custom comparison function in Python 3?
  11. How can I get 2.x-like sorting behaviour in Python 3.x?
  12. Accessing the list while being sorted
  13. Does python have a sorted list?
  14. Python sorting by multiple criteria
  15. Sort a part of a list in place
  16. How to sort IP addresses stored in dictionary in Python?
  17. Find elements of array one nearest to elements of array two
  18. How to sort with lambda in Python
  19. How to sort Counter by value? – python
  20. Sort a list of tuples depending on two elements [duplicate]
  21. How to sort a list by length of string followed by reverse alphabetical order? [duplicate]
  22. Sort a list with a custom order in Python
  23. Python Sort One List According to Another List
  24. Python: How to sort a list of dictionaries by several values?
  25. Using a comparator function to sort
  26. How to sort a list of x-y coordinates
  27. argsort for a multidimensional ndarray
  28. Nested lambda statements when sorting lists
  29. Searching a sorted list? [closed]
  30. Sorting a pandas series

Leave a Comment