/examples/earworm/utils.py

http://echo-nest-remix.googlecode.com/ · Python · 23 lines · 6 code · 3 blank · 14 comment · 3 complexity · f01080bf76315217ec36f470658c0762 MD5 · raw file 

    

  1. #!/usr/bin/env python
    2. 

  2. # encoding: utf-8
    3. 

  3. """
    4. 

  4. utils.py
    5. 

  5. 

  6. Created by Jason Sundram, on 2010-04-05.
    7. 

  7. """
    8. 

    9. 

  9. def flatten(l):
    10. 

  10.     """ Converts a list of tuples to a flat list.
    11. 

  11.         e.g. flatten([(1,2), (3,4)]) => [1,2,3,4]
    12. 

  12.     """
    13. 

  13.     return [item for pair in l for item in pair]
    14. 

  14. 

  15. def tuples(l, n=2):
    16. 

  16.     """ returns n-tuples from l.
    17. 

  17.         e.g. tuples(range(4), n=2) -> [(0, 1), (1, 2), (2, 3)]
    18. 

  18.     """
    19. 

  19.     return zip(*[l[i:] for i in range(n)])
    20. 

  20. 

  21. def rows(m):
    22. 

  22.     """returns the # of rows in a numpy matrix"""
    23. 

  23.     return m.shape[0]
    24.