Retaining Unix EOL when reading/writing in windows

[Nick Wain]

Hello All,

I'm relatively new to PYTHON, using PYTHON 2.4 on Windows XP. I'm having a
problem as below. I've asked some other people in my office who are more
experienced in PYTHON, but they can't help.

I have a number of files created in UNIX that have the UNIX end of line
(EOL) character.

I want to read these files in python, modify some lines, and then write them
to a new file. This appears to work fine, however I find that the output
files have Windows EOL characters. This is a pain, as I want to compare the
before and after files to see if my changes are correct.

I've simplified my code down to something that just reads a file and then
writes it to a different file. I'm currently doing this with a bit of code
that looks something like this:

filename = "test.lwc"
outfile = open("test_out.lwc", 'w' )
readfile = open(filename,'r').readlines()

for line in readfile:
outfile.write(line)
outfile.close()

Is there a way I can do this, but retain the UNIX EOL characters?

Cheers,
Nick

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[Diez B. Roggisch]

Nick Wain wrote:

I'm relatively new to PYTHON, using PYTHON 2.4 on Windows XP. I'm having a
problem as below. I've asked some other people in my office who are more
experienced in PYTHON, but they can't help.

I have a number of files created in UNIX that have the UNIX end of line
(EOL) character.

I want to read these files in python, modify some lines, and then write
them to a new file. This appears to work fine, however I find that the
output files have Windows EOL characters. This is a pain, as I want to
compare the before and after files to see if my changes are correct.

I've simplified my code down to something that just reads a file and then
writes it to a different file. I'm currently doing this with a bit of code
that looks something like this:

filename = "test.lwc"
outfile = open("test_out.lwc", 'w' )
readfile = open(filename,'r').readlines()

for line in readfile:
outfile.write(line)
outfile.close()

Is there a way I can do this, but retain the UNIX EOL characters?

Try using the 'b'-flag as filemode.

filename = "test.lwc"
outfile = open("test_out.lwc", 'wb' )
readfile = open(filename,'rb').readlines()

for line in readfile:
outfile.write(line)
outfile.close()

Not sure how well that plays with readline, as I have no Windows machine at
hand.

Diez