Re: iterating through files
On Thu, 19 Feb 2009 13:56:38 -0800, oamram wrote:
new to python. i have a directory with about 50 text file and i need to
iterate through them and get
line 7 to 11 from each file and write those lines into another file(one
file that will contain all lines).
Untested:
from __future__ import with_statement
from glob import glob
from itertools import islice
def main():
with open('result.txt', 'w') as out_file:
for filename in glob('foo/*.txt'):
with open(filename, 'r') as lines:
out_file.writelines(islice(lines, 7, 12))
if __name__ == __main__:
main()
Ciao,
Marc 'BlackJack' Rintsch
--
http://mail.python.org/mailman/listinfo/python-list
iterating through files
Hi Pythonist, new to python. i have a directory with about 50 text file and i need to iterate through them and get line 7 to 11 from each file and write those lines into another file(one file that will contain all lines). Cheers, Omer. -- View this message in context: http://www.nabble.com/iterating-through-files-tp22048070p22048070.html Sent from the Python - python-list mailing list archive at Nabble.com. -- http://mail.python.org/mailman/listinfo/python-list
Re: iterating through files
On Feb 19, 3:56 pm, oamram oam...@gmail.com wrote: Hi Pythonist, new to python. i have a directory with about 50 text file and i need to iterate through them and get line 7 to 11 from each file and write those lines into another file(one file that will contain all lines). Cheers, Omer. -- View this message in context:http://www.nabble.com/iterating-through-files-tp22048070p22048070.html Sent from the Python - python-list mailing list archive at Nabble.com. I would recommend using the glob module to grab a list of the files you want or you can just create your own list. Then use a loop to grab the lines you want. Something like this: f = open(textFile) newFile = open(newFileName, a) x = 1 for line in f.readlines(): if x =7 and x =11: newFile.write(line + \n) You could even put the above inside a loop that loops over the list of files. Anyway, that's one approach. I'm sure there are many others. Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: iterating through files
On Feb 19, 4:22 pm, Mike Driscoll kyoso...@gmail.com wrote: On Feb 19, 3:56 pm, oamram oam...@gmail.com wrote: Hi Pythonist, new to python. i have a directory with about 50 text file and i need to iterate through them and get line 7 to 11 from each file and write those lines into another file(one file that will contain all lines). Cheers, Omer. -- View this message in context:http://www.nabble.com/iterating-through-files-tp22048070p22048070.html Sent from the Python - python-list mailing list archive at Nabble.com. I would recommend using the glob module to grab a list of the files you want or you can just create your own list. Then use a loop to grab the lines you want. Something like this: f = open(textFile) newFile = open(newFileName, a) x = 1 for line in f.readlines(): if x =7 and x =11: newFile.write(line + \n) You could even put the above inside a loop that loops over the list of files. Anyway, that's one approach. I'm sure there are many others. Mike Oops...I forgot to iterate the counter. The code should look like this: code f = open(textFile) newFile = open(newFileName, a) x = 1 for line in f.readlines(): if x =7 and x =11: newFile.write(line + \n) x +=1 /code Sorry about that. Mike -- http://mail.python.org/mailman/listinfo/python-list
Re: iterating through files
On Thu, Feb 19, 2009 at 2:28 PM, Mike Driscoll kyoso...@gmail.com wrote: On Feb 19, 4:22 pm, Mike Driscoll kyoso...@gmail.com wrote: On Feb 19, 3:56 pm, oamram oam...@gmail.com wrote: Hi Pythonist, new to python. i have a directory with about 50 text file and i need to iterate through them and get line 7 to 11 from each file and write those lines into another file(one file that will contain all lines). Cheers, Omer. -- View this message in context:http://www.nabble.com/iterating-through-files-tp22048070p22048070.html Sent from the Python - python-list mailing list archive at Nabble.com. I would recommend using the glob module to grab a list of the files you want or you can just create your own list. Then use a loop to grab the lines you want. Something like this: f = open(textFile) newFile = open(newFileName, a) x = 1 for line in f.readlines(): if x =7 and x =11: newFile.write(line + \n) You could even put the above inside a loop that loops over the list of files. Anyway, that's one approach. I'm sure there are many others. Mike Oops...I forgot to iterate the counter. The code should look like this: code f = open(textFile) newFile = open(newFileName, a) x = 1 for line in f.readlines(): if x =7 and x =11: newFile.write(line + \n) x +=1 /code Or you could use enumerate(); also, readlines() isn't necessary: f = open(textFile) newFile = open(newFileName, a) for x, line in enumerate(f): if x =7 and x =11: newFile.write(line + \n) Sounds a bit like homework to me though... Cheers, Chris -- Follow the path of the Iguana... http://rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
Re: iterating through files
Chris Rebert wrote: On Thu, Feb 19, 2009 at 2:28 PM, Mike Driscoll kyoso...@gmail.com wrote: On Feb 19, 4:22 pm, Mike Driscoll kyoso...@gmail.com wrote: On Feb 19, 3:56 pm, oamram oam...@gmail.com wrote: Hi Pythonist, new to python. i have a directory with about 50 text file and i need to iterate through them and get line 7 to 11 from each file and write those lines into another file(one file that will contain all lines). Cheers, Omer. -- View this message in context:http://www.nabble.com/iterating-through-files-tp22048070p22048070.html Sent from the Python - python-list mailing list archive at Nabble.com. I would recommend using the glob module to grab a list of the files you want or you can just create your own list. Then use a loop to grab the lines you want. Something like this: f = open(textFile) newFile = open(newFileName, a) x = 1 for line in f.readlines(): if x =7 and x =11: newFile.write(line + \n) You could even put the above inside a loop that loops over the list of files. Anyway, that's one approach. I'm sure there are many others. Mike Oops...I forgot to iterate the counter. The code should look like this: code f = open(textFile) newFile = open(newFileName, a) x = 1 for line in f.readlines(): if x =7 and x =11: newFile.write(line + \n) x +=1 /code Or you could use enumerate(); also, readlines() isn't necessary: f = open(textFile) newFile = open(newFileName, a) for x, line in enumerate(f): if x =7 and x =11: newFile.write(line + \n) Sounds a bit like homework to me though... But all these solutions read the whole file. You should really read six lines throwing them away then read five lines to keep. Since this might be homework I'll not write the code, but it will involve f.next() ... regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: iterating through files
On Feb 19, 4:56 pm, Steve Holden st...@holdenweb.com wrote: Chris Rebert wrote: On Thu, Feb 19, 2009 at 2:28 PM, Mike Driscoll kyoso...@gmail.com wrote: On Feb 19, 4:22 pm, Mike Driscoll kyoso...@gmail.com wrote: On Feb 19, 3:56 pm, oamram oam...@gmail.com wrote: Hi Pythonist, new to python. i have a directory with about 50 text file and i need to iterate through them and get line 7 to 11 from each file and write those lines into another file(one file that will contain all lines). Cheers, Omer. -- View this message in context:http://www.nabble.com/iterating-through-files-tp22048070p22048070.html Sent from the Python - python-list mailing list archive at Nabble.com. I would recommend using the glob module to grab a list of the files you want or you can just create your own list. Then use a loop to grab the lines you want. Something like this: f = open(textFile) newFile = open(newFileName, a) x = 1 for line in f.readlines(): if x =7 and x =11: newFile.write(line + \n) You could even put the above inside a loop that loops over the list of files. Anyway, that's one approach. I'm sure there are many others. Mike Oops...I forgot to iterate the counter. The code should look like this: code f = open(textFile) newFile = open(newFileName, a) x = 1 for line in f.readlines(): if x =7 and x =11: newFile.write(line + \n) x +=1 /code Or you could use enumerate(); also, readlines() isn't necessary: f = open(textFile) newFile = open(newFileName, a) for x, line in enumerate(f): if x =7 and x =11: newFile.write(line + \n) Sounds a bit like homework to me though... But all these solutions read the whole file. You should really read six lines throwing them away then read five lines to keep. It might be useful not to assume every file has at least 11 lines and program accordingly. Since this might be homework I'll not write the code, but it will involve f.next() ... regards Steve -- Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/- Hide quoted text - - Show quoted text - -- http://mail.python.org/mailman/listinfo/python-list
