Re: loop through each line in a text file
On Feb 26, 6:19 pm, ru...@yahoo.com wrote:
On Feb 26, 2:21 pm, qtrimble qtrim...@gmail.com wrote:
On Feb 26, 4:14 pm, OdarR olivier.da...@gmail.com wrote:
snip
below is just a sample. There are well over 500,000 lines that need
processed.
wer1999001
31.2234 82.2367
37.9535 82.3456
wer1999002
31.2234 82.2367
37.9535 82.3456
did you try something as a working basis ?
Olivier
Yes but it's very simple -
fileIN = open(rC:\testing.txt, r)
for line in fileIN:
year = line[3:7]
day = line[7:10]
print year, day
This is good since i can get the year and day of year into a variable
but I haven't gotten any further.
How about something like (untested):
for line in fileIN:
if line.startswith (wer):
year = line[3:7]
day = line[7:10]
else:
print %s-%s %s % (year, day, line.strip())
You can adjust the details as needed...
Thanks to all of you for your suggestions.
This is what I have now. It may not be the most efficient or well
written script but it works! Thanks again!
fileIN = open(rC:\z_paul\ims1999.txt, r)
for line in fileIN:
if line.startswith(ims):
year = line[3:7]
day = line[7:10]
newfile = file(rC:\z_paul\output\ims + year + day + .txt,
wt)
newfile.write(YEAR,DOY,Y_COORD,X_COORD,TYPE\n)
else:
temp = line.replace(' ',',')
temp2 = temp.replace(', ',',')
newfile.write(year + , + day + temp2)
newfile.close()
--
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Re: loop through each line in a text file
* qtrimble: I'm a python newbie but I do have some basic scripting experience. I need to take the line starting with wer and extract the year and day of year from that string. I want to be able to add the year and day of year from the last line having wer* to the lines occurring in between wer* lines. Python seems suitable to do this and I'm fairly certain I can eventually get this to work but I've been hit with a very short time frame so I'm looking for any generous help. The data below is just a sample. There are well over 500,000 lines that need processed. wer1999001 31.2234 82.2367 37.9535 82.3456 wer1999002 31.2234 82.2367 37.9535 82.3456 example line = wer1999001 line 'wer1999001' line[3:3+4] '1999' line[7:7+3] '001' _ /example Cheers hth., - Alf -- http://mail.python.org/mailman/listinfo/python-list
Re: loop through each line in a text file
On 26 fév, 22:08, qtrimble qtrim...@gmail.com wrote: I'm a python newbie but I do have some basic scripting experience. I need to take the line starting with wer and extract the year and day of year from that string. I want to be able to add the year and day of year from the last line having wer* to the lines occurring in between wer* lines. Python seems suitable to do this and I'm fairly certain I can eventually get this to work but I've been hit with a very short time frame so I'm looking for any generous help. The data below is just a sample. There are well over 500,000 lines that need processed. wer1999001 31.2234 82.2367 37.9535 82.3456 wer1999002 31.2234 82.2367 37.9535 82.3456 did you try something as a working basis ? Olivier -- http://mail.python.org/mailman/listinfo/python-list
Re: loop through each line in a text file
On Feb 26, 4:14 pm, OdarR olivier.da...@gmail.com wrote: On 26 fév, 22:08, qtrimble qtrim...@gmail.com wrote: I'm a python newbie but I do have some basic scripting experience. I need to take the line starting with wer and extract the year and day of year from that string. I want to be able to add the year and day of year from the last line having wer* to the lines occurring in between wer* lines. Python seems suitable to do this and I'm fairly certain I can eventually get this to work but I've been hit with a very short time frame so I'm looking for any generous help. The data below is just a sample. There are well over 500,000 lines that need processed. wer1999001 31.2234 82.2367 37.9535 82.3456 wer1999002 31.2234 82.2367 37.9535 82.3456 did you try something as a working basis ? Olivier Yes but it's very simple - fileIN = open(rC:\testing.txt, r) for line in fileIN: year = line[3:7] day = line[7:10] print year, day This is good since i can get the year and day of year into a variable but I haven't gotten any further. -- http://mail.python.org/mailman/listinfo/python-list
Re: loop through each line in a text file
On 2/26/2010 4:21 PM, qtrimble wrote: fileIN = open(rC:\testing.txt, r) for line in fileIN: year = line[3:7] day = line[7:10] print year, day This is good since i can get the year and day of year into a variable but I haven't gotten any further. That's an excellent start. Here's another hint ... There are two kinds of lines in your input file: * lines that begin with wer * all other lines So you need an if-else section to process the lines in the input file: if line.startswith(wer): # use the contents of *line* to assign values # to variables *year* and *day* ... else: # use the current values of *year* and *day* # to process the numbers extracted from *line* Most likely, you'll also need these functions: * split() -- chop a string into pieces * int() -- string-to-integer conversion HTH, John -- http://mail.python.org/mailman/listinfo/python-list
Re: loop through each line in a text file
On Feb 26, 2:21 pm, qtrimble qtrim...@gmail.com wrote: On Feb 26, 4:14 pm, OdarR olivier.da...@gmail.com wrote: snip below is just a sample. There are well over 500,000 lines that need processed. wer1999001 31.2234 82.2367 37.9535 82.3456 wer1999002 31.2234 82.2367 37.9535 82.3456 did you try something as a working basis ? Olivier Yes but it's very simple - fileIN = open(rC:\testing.txt, r) for line in fileIN: year = line[3:7] day = line[7:10] print year, day This is good since i can get the year and day of year into a variable but I haven't gotten any further. How about something like (untested): for line in fileIN: if line.startswith (wer): year = line[3:7] day = line[7:10] else: print %s-%s %s % (year, day, line.strip()) You can adjust the details as needed... -- http://mail.python.org/mailman/listinfo/python-list
Re: loop through each line in a text file
I smell homework -- http://mail.python.org/mailman/listinfo/python-list
