[Tutor] Problem on filtering data
Dear All; I have a very silly problem. with open(Dati_differenzialigistvsminigist_solodiff.csv) as p: for i in p: lines = i.strip(\n).split(\t) if lines[8] != NA: if lines[8] : print lines[8] Why I continue to obtain empity line? baseMeanlog2FoldChangelfcSEstatpvaluepadj ensemblhgnc_symboluniprotentrez ENSG000146049.2127074325806-1.230249313832590.386060601796602 -3.186674082015650.001439188499137720.0214436050108864 ENSG0001460STPG1Q5TH7490529 ENSG0001631104.058286326346-0.805557044512410.294010285837035 -2.739894089824180.006145898532814860.0574525590840568 ENSG0001631KRIT1O00522889 ENSG00029331777.439389337051.586302553551380.608489070400574 2.606953239944140.009135183446056390.0740469624219782 ENSG0002933TMEM176AQ96HP855365 ENSG00031377.120731227135742.212658945608880.501823258624614 4.409239523240291.03734243663752e-050.000620867030402752 ENSG0003137CYP26B1Q9NR6356603 ENSG00039898.98972643541858-1.191561953259440.467992084035133 -2.546115615857280.0108929103912960.0832138232974883 ENSG0003989SLC7A2P525696542 ENSG0004478352.6800097036971.077810136145450.371617391411002 2.900322108319780.003727793670877750.041335008661432 ENSG0004478FKBP4Q027902288 ENSG00047761808.49276145547-2.226919751099480.560563734648272 -3.972643275785177.10794561495787e-050.00243688669444854 ENSG0004776HSPB6O14558126393 ENSG0004779110.0665574143771.03716286291060.375665509210244 2.760867946304180.005764798038383960.0552052693506261ENSG0 thanks so much ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Problem on filtering data
On Mon, Jun 08, 2015 at 04:50:13PM +0200, jarod_v6--- via Tutor wrote: Dear All; I have a very silly problem. The right way to handle CSV files is to use the csv module: https://docs.python.org/2/library/csv.html http://pymotw.com/2/csv/ Some more comments further below. with open(Dati_differenzialigistvsminigist_solodiff.csv) as p: for i in p: lines = i.strip(\n).split(\t) if lines[8] != NA: if lines[8] : print lines[8] Why I continue to obtain empity line? I don't know. What do you mean 'obtain empty line'? Do you mean that every line is empty? Some of the lines are empty? One empty line at the end? How do you know it is empty? You need to explain more. Perhaps put this instead: print repr(lines[8]) to see what it contains. Perhaps there are invisible s p a c e s so it only looks empty. Some more comments: In English, we would describe open(Daticsv) as a file, and write with open(Daticsv) as f: # f for file I suppose in Italian you might say archivio, and write: with open(Daticsv) as a: But what is p? The next line is also confusing: for i in p: for i in ... is used for loops over the integers 0, 1, 2, 3, ... and should not be used for anything else. Here, you loop over the lines in the file, so you should write: for line in p: fields = line.strip(\n).split(\t) or perhaps columns instead of fields. But lines is completely wrong, because you are looking at one line at a time. -- Steve ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Problem on filtering data
On 08/06/15 15:50, jarod_v6--- via Tutor wrote: with open(Dati_differenzialigistvsminigist_solodiff.csv) as p: You are usually better off processing CSV files (or in your case tab separated) using the CSV module. for i in p: lines = i.strip(\n).split(\t) if lines[8] != NA: if lines[8] : print lines[8] Why I continue to obtain empity line? What does empty line mean? Do you get a line printed with no content? Or no line printed? I've no idea, but I do notice that you last line is not complete - ie it only has 8 fields. so lines[8] != NA should fail with an index error! Also your headings only have 10 entries but your lines have 11? Also you are processing the headings line in the same way as the rest of the data, is that correct? baseMeanlog2FoldChangelfcSEstatpvaluepadjensembl hgnc_symboluniprotentrez ENSG000146049.2127074325806-1.230249313832590.386060601796602-3.18667408201565 0.001439188499137720.0214436050108864ENSG0001460STPG1Q5TH74 90529 ENSG0004779110.0665574143771.03716286291060.375665509210244 2.760867946304180.005764798038383960.0552052693506261ENSG0 HTH -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.amazon.com/author/alan_gauld Follow my photo-blog on Flickr at: http://www.flickr.com/photos/alangauldphotos ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
