Re: [Tutor] sorting file paths made up of of strings and numbers
On Tue, Apr 14, 2009 at 10:36 PM, Bill Campbell wrote: > On Tue, Apr 14, 2009, Emad Nawfal ( ) wrote: > > > > Hi tutors, > > How can I sort the following list in a way that takes care of the > > right order of numbers? The sorted function compares strings here as > > far as I can see, but I want to have filepath2 follow filepath1. Your > > help is appreciated. > > There is at least one example of a method of dealing with this in > the O'Reilly ``Python cookbook''. > > > >>> myList > > ['filepath54', 'filepath25', 'filepath49', 'filepath0', 'filepath89', > > 'filepath52', 'filepath37', 'filepath32', 'filepath2', 'filepath15', > > 'filepath88', 'filepath70', 'filepath33', 'filepath58', 'filepath28', > > 'filepath61', 'filepath23', 'filepath64', 'filepath72', 'filepath11', > > 'filepath63', 'filepath76', 'filepath87', 'filepath45', 'filepath41', > > 'filepath68', 'filepath81', 'filepath75', 'filepath62', 'filepath46', > > 'filepath36', 'filepath39', 'filepath5', 'filepath34', 'filepath8', > > 'filepath67', 'filepath14', 'filepath82', 'filepath29', 'filepath47', > > 'filepath79', 'filepath13', 'filepath16', 'filepath71', 'filepath27', > > 'filepath100', 'filepath20', 'filepath92', 'filepath57', 'filepath73', > > 'filepath40', 'filepath44', 'filepath83', 'filepath50', 'filepath66', > > 'filepath94', 'filepath86', 'filepath22', 'filepath17', 'filepath84', > > 'filepath38', 'filepath12', 'filepath53', 'filepath6', 'filepath48', > > 'filepath60', 'filepath51', 'filepath90', 'filepath4', 'filepath78', > > 'filepath69', 'filepath35', 'filepath97', 'filepath93', 'filepath24', > > 'filepath26', 'filepath1', 'filepath3', 'filepath96', 'filepath77', > > 'filepath98', 'filepath18', 'filepath43', 'filepath19', 'filepath56', > > 'filepath65', 'filepath95', 'filepath55', 'filepath7', 'filepath99', > > 'filepath91', 'filepath85', 'filepath9', 'filepath59', 'filepath10', > > 'filepath30', 'filepath31', 'filepath80', 'filepath42', 'filepath74', > > 'filepath21'] > > >>> sorted(myList) > > ['filepath0', 'filepath1', 'filepath10', 'filepath100', 'filepath11', > > 'filepath12', 'filepath13', 'filepath14', 'filepath15', 'filepath16', > > 'filepath17', 'filepath18', 'filepath19', 'filepath2', 'filepath20', > > 'filepath21', 'filepath22', 'filepath23', 'filepath24', 'filepath25', > > 'filepath26', 'filepath27', 'filepath28', 'filepath29', 'filepath3', > > 'filepath30', 'filepath31', 'filepath32', 'filepath33', 'filepath34', > > 'filepath35', 'filepath36', 'filepath37', 'filepath38', 'filepath39', > > 'filepath4', 'filepath40', 'filepath41', 'filepath42', 'filepath43', > > 'filepath44', 'filepath45', 'filepath46', 'filepath47', 'filepath48', > > 'filepath49', 'filepath5', 'filepath50', 'filepath51', 'filepath52', > > 'filepath53', 'filepath54', 'filepath55', 'filepath56', 'filepath57', > > 'filepath58', 'filepath59', 'filepath6', 'filepath60', 'filepath61', > > 'filepath62', 'filepath63', 'filepath64', 'filepath65', 'filepath66', > > 'filepath67', 'filepath68', 'filepath69', 'filepath7', 'filepath70', > > 'filepath71', 'filepath72', 'filepath73', 'filepath74', 'filepath75', > > 'filepath76', 'filepath77', 'filepath78', 'filepath79', 'filepath8', > > 'filepath80', 'filepath81', 'filepath82', 'filepath83', 'filepath84', > > 'filepath85', 'filepath86', 'filepath87', 'filepath88', 'filepath89', > > 'filepath9', 'filepath90', 'filepath91', 'filepath92', 'filepath93', > > 'filepath94', 'filepath95', 'filepath96', 'filepath97', 'filepath98', > > 'filepath99'] > > >>> ``` > > -- > > áÇ ÃÚÑÝ ãÙáæãÇ ÊæÇØà ÇáäÇÓ Úáí åÖãå æáÇ ÒåÏæÇ Ýí ÅäÕÇÝå > > ßÇáÍÞíÞÉ.ãÍãÏ ÇáÛÒÇáí > > "No victim has ever been more repressed and alienated than the truth" > > Emad Soliman Nawfal > > Indiana University, Bloomington > > > > >___ > >Tutor maillist - Tutor@python.org > >http://mail.python.org/mailman/listinfo/tutor > > > -- > Bill > -- > INTERNET: b...@celestial.com Bill Campbell; Celestial Software LLC > URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way > Voice: (206) 236-1676 Mercer Island, WA 98040-0820 > Fax:(206) 232-9186 Skype: jwccsllc (206) 855-5792 > > An almost hysterical antagonism toward the gold standard is one issue which > unites statists of all persuasions. They seem to sense that gold and > economic freedom are inseparable. -- Alan Greenspan > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > Thank you Kent and Bill. This is much easier than itemgetter. -- لا أعرف مظلوما تواطأ الناس علي هضمه ولا زهدوا في إنصافه كالحقيقة.محمد الغزالي "No victim has ever been more repressed and alienated than the truth" Emad Soliman Nawfal Indiana University, Bloomington -
Re: [Tutor] sorting file paths made up of of strings and numbers
On Tue, Apr 14, 2009, Emad Nawfal ( ) wrote: > > Hi tutors, > How can I sort the following list in a way that takes care of the > right order of numbers? The sorted function compares strings here as > far as I can see, but I want to have filepath2 follow filepath1. Your > help is appreciated. There is at least one example of a method of dealing with this in the O'Reilly ``Python cookbook''. > >>> myList > ['filepath54', 'filepath25', 'filepath49', 'filepath0', 'filepath89', > 'filepath52', 'filepath37', 'filepath32', 'filepath2', 'filepath15', > 'filepath88', 'filepath70', 'filepath33', 'filepath58', 'filepath28', > 'filepath61', 'filepath23', 'filepath64', 'filepath72', 'filepath11', > 'filepath63', 'filepath76', 'filepath87', 'filepath45', 'filepath41', > 'filepath68', 'filepath81', 'filepath75', 'filepath62', 'filepath46', > 'filepath36', 'filepath39', 'filepath5', 'filepath34', 'filepath8', > 'filepath67', 'filepath14', 'filepath82', 'filepath29', 'filepath47', > 'filepath79', 'filepath13', 'filepath16', 'filepath71', 'filepath27', > 'filepath100', 'filepath20', 'filepath92', 'filepath57', 'filepath73', > 'filepath40', 'filepath44', 'filepath83', 'filepath50', 'filepath66', > 'filepath94', 'filepath86', 'filepath22', 'filepath17', 'filepath84', > 'filepath38', 'filepath12', 'filepath53', 'filepath6', 'filepath48', > 'filepath60', 'filepath51', 'filepath90', 'filepath4', 'filepath78', > 'filepath69', 'filepath35', 'filepath97', 'filepath93', 'filepath24', > 'filepath26', 'filepath1', 'filepath3', 'filepath96', 'filepath77', > 'filepath98', 'filepath18', 'filepath43', 'filepath19', 'filepath56', > 'filepath65', 'filepath95', 'filepath55', 'filepath7', 'filepath99', > 'filepath91', 'filepath85', 'filepath9', 'filepath59', 'filepath10', > 'filepath30', 'filepath31', 'filepath80', 'filepath42', 'filepath74', > 'filepath21'] > >>> sorted(myList) > ['filepath0', 'filepath1', 'filepath10', 'filepath100', 'filepath11', > 'filepath12', 'filepath13', 'filepath14', 'filepath15', 'filepath16', > 'filepath17', 'filepath18', 'filepath19', 'filepath2', 'filepath20', > 'filepath21', 'filepath22', 'filepath23', 'filepath24', 'filepath25', > 'filepath26', 'filepath27', 'filepath28', 'filepath29', 'filepath3', > 'filepath30', 'filepath31', 'filepath32', 'filepath33', 'filepath34', > 'filepath35', 'filepath36', 'filepath37', 'filepath38', 'filepath39', > 'filepath4', 'filepath40', 'filepath41', 'filepath42', 'filepath43', > 'filepath44', 'filepath45', 'filepath46', 'filepath47', 'filepath48', > 'filepath49', 'filepath5', 'filepath50', 'filepath51', 'filepath52', > 'filepath53', 'filepath54', 'filepath55', 'filepath56', 'filepath57', > 'filepath58', 'filepath59', 'filepath6', 'filepath60', 'filepath61', > 'filepath62', 'filepath63', 'filepath64', 'filepath65', 'filepath66', > 'filepath67', 'filepath68', 'filepath69', 'filepath7', 'filepath70', > 'filepath71', 'filepath72', 'filepath73', 'filepath74', 'filepath75', > 'filepath76', 'filepath77', 'filepath78', 'filepath79', 'filepath8', > 'filepath80', 'filepath81', 'filepath82', 'filepath83', 'filepath84', > 'filepath85', 'filepath86', 'filepath87', 'filepath88', 'filepath89', > 'filepath9', 'filepath90', 'filepath91', 'filepath92', 'filepath93', > 'filepath94', 'filepath95', 'filepath96', 'filepath97', 'filepath98', > 'filepath99'] > >>> ``` > -- > áÇ ÃÚÑÝ ãÙáæãÇ ÊæÇØà ÇáäÇÓ Úáí åÖãå æáÇ ÒåÏæÇ Ýí ÅäÕÇÝå > ßÇáÍÞíÞÉ.ãÍãÏ ÇáÛÒÇáí > "No victim has ever been more repressed and alienated than the truth" > Emad Soliman Nawfal > Indiana University, Bloomington > >___ >Tutor maillist - Tutor@python.org >http://mail.python.org/mailman/listinfo/tutor -- Bill -- INTERNET: b...@celestial.com Bill Campbell; Celestial Software LLC URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way Voice: (206) 236-1676 Mercer Island, WA 98040-0820 Fax:(206) 232-9186 Skype: jwccsllc (206) 855-5792 An almost hysterical antagonism toward the gold standard is one issue which unites statists of all persuasions. They seem to sense that gold and economic freedom are inseparable. -- Alan Greenspan ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] sorting file paths made up of of strings and numbers
2009/4/14 Emad Nawfal (عماد نوفل) : > Hi tutors, > How can I sort the following list in a way that takes care of the right > order of numbers? The sorted function compares strings here as far as I can > see, but I want to have filepath2 follow filepath1. Your help is > appreciated. myList > ['filepath54', 'filepath25', 'filepath49', 'filepath0', 'filepath89', > 'filepath52', 'filepath37', 'filepath32', 'filepath2', 'filepath15', The sort() and sorted() functions have an optional key= parameter. The parameter should be a function whose argument is a list element and whose result is the desired key. So for your list, you need a function that creates an integer from the list item: In [1]: myList = ['filepath54', 'filepath25', 'filepath49', 'filepath0', 'filepath89', 'filepath52', 'filepath37', 'filepath32', ' filepath2', 'filepath15'] In [2]: def index(fp): return int(fp[8:]) Now sort the list using the key: In [3]: myList.sort(key=index) In [4]: myList Out[4]: ['filepath0', 'filepath2', 'filepath15', 'filepath25', 'filepath32', 'filepath37', 'filepath49', 'filepath52', 'filepath54', 'filepath89'] Note that the key parameter takes the function object itself, there are no parentheses. i.e. key=index, not key=index(). Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] sorting file paths made up of of strings and numbers
On Tue, Apr 14, 2009 at 8:10 PM, wesley chun wrote: > > How can I sort the following list in a way that takes care of the right > > order of numbers? The sorted function compares strings here as far as I > can > > see, but I want to have filepath2 follow filepath1. Your help is > > appreciated. > myList > > ['filepath54', 'filepath25', 'filepath49', 'filepath0', 'filepath89', > > 'filepath52', 'filepath37', 'filepath32', 'filepath2', 'filepath15', > >: > > 'filepath91', 'filepath85', 'filepath9', 'filepath59', 'filepath10', > > 'filepath30', 'filepath31', 'filepath80', 'filepath42', 'filepath74', > > 'filepath21'] > > > unfortunately, we're restricted from solving your homework problems > for you, however, we can tell you that you can still use sorted(). > just combine that with operator.itemgetter(), and you should be well > on your way to solving your problem! > > hope this helps! > -- wesley > - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - > "Core Python Programming", Prentice Hall, (c)2007,2001 > "Python Fundamentals", Prentice Hall, (c)2009 >http://corepython.com > > wesley.j.chun :: wescpy-at-gmail.com > python training and technical consulting > cyberweb.consulting : silicon valley, ca > http://cyberwebconsulting.com > Thank you so much Wesley for the tip. I'll look into itemgetter() This is not a homework problem though, but I'm working on a paper in which this is useful. So, it is related to school, but is by no means a homework. -- لا أعرف مظلوما تواطأ الناس علي هضمه ولا زهدوا في إنصافه كالحقيقة.محمد الغزالي "No victim has ever been more repressed and alienated than the truth" Emad Soliman Nawfal Indiana University, Bloomington ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] sorting file paths made up of of strings and numbers
> How can I sort the following list in a way that takes care of the right > order of numbers? The sorted function compares strings here as far as I can > see, but I want to have filepath2 follow filepath1. Your help is > appreciated. myList > ['filepath54', 'filepath25', 'filepath49', 'filepath0', 'filepath89', > 'filepath52', 'filepath37', 'filepath32', 'filepath2', 'filepath15', >: > 'filepath91', 'filepath85', 'filepath9', 'filepath59', 'filepath10', > 'filepath30', 'filepath31', 'filepath80', 'filepath42', 'filepath74', > 'filepath21'] unfortunately, we're restricted from solving your homework problems for you, however, we can tell you that you can still use sorted(). just combine that with operator.itemgetter(), and you should be well on your way to solving your problem! hope this helps! -- wesley - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "Core Python Programming", Prentice Hall, (c)2007,2001 "Python Fundamentals", Prentice Hall, (c)2009 http://corepython.com wesley.j.chun :: wescpy-at-gmail.com python training and technical consulting cyberweb.consulting : silicon valley, ca http://cyberwebconsulting.com ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] sorting file paths made up of of strings and numbers
Hi tutors, How can I sort the following list in a way that takes care of the right order of numbers? The sorted function compares strings here as far as I can see, but I want to have filepath2 follow filepath1. Your help is appreciated. >>> myList ['filepath54', 'filepath25', 'filepath49', 'filepath0', 'filepath89', 'filepath52', 'filepath37', 'filepath32', 'filepath2', 'filepath15', 'filepath88', 'filepath70', 'filepath33', 'filepath58', 'filepath28', 'filepath61', 'filepath23', 'filepath64', 'filepath72', 'filepath11', 'filepath63', 'filepath76', 'filepath87', 'filepath45', 'filepath41', 'filepath68', 'filepath81', 'filepath75', 'filepath62', 'filepath46', 'filepath36', 'filepath39', 'filepath5', 'filepath34', 'filepath8', 'filepath67', 'filepath14', 'filepath82', 'filepath29', 'filepath47', 'filepath79', 'filepath13', 'filepath16', 'filepath71', 'filepath27', 'filepath100', 'filepath20', 'filepath92', 'filepath57', 'filepath73', 'filepath40', 'filepath44', 'filepath83', 'filepath50', 'filepath66', 'filepath94', 'filepath86', 'filepath22', 'filepath17', 'filepath84', 'filepath38', 'filepath12', 'filepath53', 'filepath6', 'filepath48', 'filepath60', 'filepath51', 'filepath90', 'filepath4', 'filepath78', 'filepath69', 'filepath35', 'filepath97', 'filepath93', 'filepath24', 'filepath26', 'filepath1', 'filepath3', 'filepath96', 'filepath77', 'filepath98', 'filepath18', 'filepath43', 'filepath19', 'filepath56', 'filepath65', 'filepath95', 'filepath55', 'filepath7', 'filepath99', 'filepath91', 'filepath85', 'filepath9', 'filepath59', 'filepath10', 'filepath30', 'filepath31', 'filepath80', 'filepath42', 'filepath74', 'filepath21'] >>> sorted(myList) ['filepath0', 'filepath1', 'filepath10', 'filepath100', 'filepath11', 'filepath12', 'filepath13', 'filepath14', 'filepath15', 'filepath16', 'filepath17', 'filepath18', 'filepath19', 'filepath2', 'filepath20', 'filepath21', 'filepath22', 'filepath23', 'filepath24', 'filepath25', 'filepath26', 'filepath27', 'filepath28', 'filepath29', 'filepath3', 'filepath30', 'filepath31', 'filepath32', 'filepath33', 'filepath34', 'filepath35', 'filepath36', 'filepath37', 'filepath38', 'filepath39', 'filepath4', 'filepath40', 'filepath41', 'filepath42', 'filepath43', 'filepath44', 'filepath45', 'filepath46', 'filepath47', 'filepath48', 'filepath49', 'filepath5', 'filepath50', 'filepath51', 'filepath52', 'filepath53', 'filepath54', 'filepath55', 'filepath56', 'filepath57', 'filepath58', 'filepath59', 'filepath6', 'filepath60', 'filepath61', 'filepath62', 'filepath63', 'filepath64', 'filepath65', 'filepath66', 'filepath67', 'filepath68', 'filepath69', 'filepath7', 'filepath70', 'filepath71', 'filepath72', 'filepath73', 'filepath74', 'filepath75', 'filepath76', 'filepath77', 'filepath78', 'filepath79', 'filepath8', 'filepath80', 'filepath81', 'filepath82', 'filepath83', 'filepath84', 'filepath85', 'filepath86', 'filepath87', 'filepath88', 'filepath89', 'filepath9', 'filepath90', 'filepath91', 'filepath92', 'filepath93', 'filepath94', 'filepath95', 'filepath96', 'filepath97', 'filepath98', 'filepath99'] >>> ``` -- لا أعرف مظلوما تواطأ الناس علي هضمه ولا زهدوا في إنصافه كالحقيقة.محمد الغزالي "No victim has ever been more repressed and alienated than the truth" Emad Soliman Nawfal Indiana University, Bloomington ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
