Academic Work Personal
|
Python /
Sorting
The following examples were taken from http://xahlee.org/perl-python/sort_list.html . # 1st example li = [1,9,2,3] li.sort() # the list is changed IN PLACE print li # [1, 2, 3, 9] # 2nd example: sort the elems by the embedded numbers files = ['my283.jpg', 'my23i.jpg', 'web7-s.jpg', 'fris88large.jpg'] def myComp(x, y): import re def getNum(str): return float( re.search(r'(\d+)', str).group(1) ) return cmp(getNum(x), getNum(y)) files.sort(myComp) print files # ['web7-s.jpg', 'my23i.jpg', 'fris88large.jpg', 'my283.jpg'] A better way for the 2nd example: import re def my_func(fname): return int(re.search(r'\d+', fname).group()) def main(): files = ['my283.jpg', 'my23i.jpg', 'web7-s.jpg', 'fris88large.jpg'] print sorted(files, key=my_func) Descending order: li = [1,9,2,3] li.sort(reverse=True) print li # [9, 3, 2, 1] This is much more efficient than sorting in ascending order first and then reversing the list. |
anime | bash | blogs | bsd | c/c++ | c64 | calc | comics | convert | cube | del.icio.us | digg | east | eBooks | egeszseg | elite | firefox | flash | fun | games | gimp | google | groovy | hardware | hit&run | howto | java | javascript | knife | lang | latex | liferay | linux | lovecraft | magyar | maths | movies | music | p2p | perl | pdf | photoshop | php | pmwiki | prog | python | radio | recept | rts | scala | scene | sci-fi | scripting | security | shell | space | súlyos | telephone | torrente | translate | ubuntu | vim | wallpapers | webutils | wikis | windows Blogs and Dev. * Ubuntu Incident Places Debrecen | France | Hungary | Montreal | Nancy Notes Hobby Projects * Jabba's Codes Quick Links [ edit ] |