Would this work for you? a = ['Name = stuff','CGTATAGCTAGCTA','Name = stuff','CGATATGCCGGCTA'] for index,thing in enumerate(a): if "Name=" in thing: del a[index]
I know, that it might be slow, but I thought that maybe it would hold its own because it doesn't have to import the re module, everything's builtin, etc. HTH, Jacob Hello group, > Thank you very much for your kind replies. In fact I > survived to pull out what I needed by going with > Kent's tip by enumerating on iterator. > > The problem with me is suddenly I embarked on > something big problem and I am surviving it in pieces > by writing pieces of code. > > > I have another question: > To be brief: > > My list contains some elements that I do not want and > I want to remove unwanted elements in my list: > > My TEXT file looks like this: > > Name=32972_at > Cell1=xxx xxx N control 32972_at > Cell1=xxx xxx N control 32972_at > Cell1=xxx xxx N control 32972_at > Cell1=xxx xxx N control 32972_at > Name=3456_at > Cell1=xxx xxx N control 3456_at > Cell1=xxx xxx N control 3456_at > Cell1=xxx xxx N control 3456_at > Cell1=xxx xxx N control 3456_at > ......... ... x xxxxxxxxxxxxxxx > (34K lines) > > I want to remove Name=Xxxx_at identifiers. > > > My List: > ['Name=32972_at', > 'Cell1=432\t118\tN\tcontrol\t32972_at\t0\t13\tA\tA\tA\t0\t75952\t-1\t-1\t99\ t', > 'Cell2=432\t117\tN\tcontrol\t32972_at\t0\t13\tA\tT\tA\t0\t75312\t-1\t-1\t99\ t', > 'Cell3=499\t632\tN\tcontrol\t32972_at\t1\t13\tC\tC\tC\t1\t404979\t-1\t-1\t99 \t'] > > > I tried to resolve in this way: > > >>>pat = re.compile('Name') > >>> for i in range(len(cord)): > x = pat.search(cord[i]) > cord.remove(x) > > I know I am wrong here because I do not know how to > search and remove an element in a list. Can any one > please help me. > > on Page 98, chapter Lists and dictionaries of mark > lutz's learning python. It is mentioned in table 6-1 : > L2.append(4) Methods: grow,sort,search,reverse etc. > > > Although not much is covered on this aspect in this > book, I failed to do more operations on list. > > Looking forward for help from tutors. > > Thank you. > Kumar. > > > > > > > --- Kent Johnson <[EMAIL PROTECTED]> wrote: > > > kumar, > > > > Looking at the quantity and structure of your data I > > think the search you are doing is going to be > > pretty slow - you will be doing 4504 * 398169 = > > 1,793,353,176 string searches. > > > > Where does the seq data come from? Could you > > consolidate the pairs of lines into a single record? > > If > > you do that and extract the '399:559' portion, you > > could build a dict that maps '399:559' to the > > full record. Looking up '399:559' in the dictionary > > would be much, much faster than searching the > > entire list. > > > > If you have multiple entries for '399:559' you could > > have the dict map to a list. > > > > Kent > > > > kumar s wrote: > > > > > >>>>len(x) > > > > > > 4504 > > > > > >>>>x[1:10] > > > > > > ['454:494', '319:607', '319:608', '322:289', > > > '322:290', '183:330', '183:329', '364:95', > > '364:96'] > > > > > >>>>len(seq) > > > > > > 398169 > > > > > >>>>seq[0:4] > > > > > > ['>probe:HG-U95Av2:1000_at:399:559; > > > Interrogation_Position=1367; Antisense;', > > > 'TCTCCTTTGCTGAGGCCTCCAGCTT', > > > '>probe:HG-U95Av2:1000_at:544:185; > > > Interrogation_Position=1379; Antisense;', > > > 'AGGCCTCCAGCTTCAGGCAGGCCAA'] > > > > > > > > > > > >>>>for ele1 in x: > > > > > > for ele2 in seq: > > > if ele1 in ele2: > > > print ele2 > > > > > > > > > > > >>probe:HG-U95Av2:31358_at:454:493; > > > > > > Interrogation_Position=132; Antisense; > > > > > >>probe:HG-U95Av2:31358_at:319:607; > > > > > > Interrogation_Position=144; Antisense; > > > > > > > > > > > > > > > > > > > > > How Do I WANT: > > > > > > I want to print get an output like this: > > > > > > > > > > > >>probe:HG-U95Av2:1000_at:399:559; > > > > > > Interrogation_Position=1367; Antisense;' > > > TCTCCTTTGCTGAGGCCTCCAGCTT > > > > > > > > >>probe:HG-U95Av2:1000_at:544:185; > > > > > > Interrogation_Position=1379; Antisense; > > > AGGCCTCCAGCTTCAGGCAGGCCAA > > > > > > > > > can any one please suggest what is going wrong in > > my > > > statements and how can I get it. > > > > > > Thank you. > > > Kumar > > > > > > > > > > > > __________________________________ > > > Do you Yahoo!? > > > Yahoo! Mail - 250MB free storage. Do more. Manage > > less. > > > http://info.mail.yahoo.com/mail_250 > > > _______________________________________________ > > > Tutor maillist - [EMAIL PROTECTED] > > > http://mail.python.org/mailman/listinfo/tutor > > > > > _______________________________________________ > > Tutor maillist - [EMAIL PROTECTED] > > http://mail.python.org/mailman/listinfo/tutor > > > > > > > __________________________________ > Do you Yahoo!? > Yahoo! Mail - now with 250MB free storage. Learn more. > http://info.mail.yahoo.com/mail_250 > _______________________________________________ > Tutor maillist - [EMAIL PROTECTED] > http://mail.python.org/mailman/listinfo/tutor > > _______________________________________________ Tutor maillist - [EMAIL PROTECTED] http://mail.python.org/mailman/listinfo/tutor