Mercurial > pylearn
comparison common/misc.py @ 355:430c9e92cd23
Added common directory
| author | Joseph Turian <turian@iro.umontreal.ca> |
|---|---|
| date | Thu, 19 Jun 2008 16:12:29 -0400 |
| parents | |
| children | 2291a244a887 |
comparison
equal
deleted
inserted
replaced
| 354:d580b3a369a4 | 355:430c9e92cd23 |
|---|---|
| 1 def sign(i, assertions=True): | |
| 2 """ | |
| 3 + or - 1 | |
| 4 @precondition: i != 0 | |
| 5 """ | |
| 6 if assertions: | |
| 7 assert i != 0 | |
| 8 else: | |
| 9 if i == 0: return 0 | |
| 10 | |
| 11 return +1 if i > 0 else -1 | |
| 12 | |
| 13 def percent_string(a, b): | |
| 14 assert a <= b | |
| 15 assert a >= 0 | |
| 16 assert b > 0 | |
| 17 return "%s of %s (%.2f%%)" % (a, b, 100.*a/b) | |
| 18 | |
| 19 def unique_elements_list_intersection(list1,list2): | |
| 20 """ | |
| 21 Return the unique elements that are in both list1 and list2 | |
| 22 (repeated elements in listi will not be duplicated in the result). | |
| 23 This should run in O(n1+n2) where n1=|list1|, n2=|list2|. | |
| 24 """ | |
| 25 return list(set.intersection(set(list1),set(list2))) |