On 11/11/2018 06:49, Asad wrote: > Hi All , > > If I am loading a logfile what should I use from the option 1,2,3 > > f3 = open ( r"/a/b/c/d/test/test_2814__2018_10_05_12_12_45/logA.log", 'r' ) > > 1) should only iterate over f3
This is best for processing line by line which is the most common way to handle files. It saves memory and allows you to exit early, without reading the entire file if you are only looking for say a single entry. for line in file: if terminal_Condition: break # process line here > 2) st = f3.read() The best solution if you want to process individual characters or small character groups. Also best if you want to process the entire file at once, for example using a regular expression which might span lines. > 3) st1 = f3.readlines() Mainly historical and superseded by iterating over the file. But sometimes useful if you need to do multiple passes over the lines since it only reads the file once. Very heavy memory footprint for big files. -- 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
