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"readline() " omitted '\r' in win32 for dos format text file

Hi, group,
I have python2.3 installed on win2k. I noticed that when I open a
dos format text file (eol is '\r\n'), readline() always returns a line
ending with '\n' only, not '\r\n'. While I read the same file on unix,
it returns a line ending with '\r\n' correctly.
This makes me difficult to determine the format of a text file, dos or
unix.

Is this a bug or intended behavior? If not a bug, then how to
determine the format of a text file?

Thanks.

C

Jul 18 '05 #1
1 2757
Newgene wrote:
I have python2.3 installed on win2k. I noticed that when I open a
dos format text file (eol is '\r\n'), readline() always returns a line
ending with '\n' only, not '\r\n'. While I read the same file on unix,
it returns a line ending with '\r\n' correctly.
This makes me difficult to determine the format of a text file, dos or
unix.

Is this a bug or intended behavior? If not a bug, then how to
determine the format of a text file?


It's not a bug. On windows, files are opened in text mode by default.

Opening a file in binary mode

file(name, "rb")

will preserve the line endings regardless of platform while opening it in
"universal" mode

file(name, "rU")

will normalize all line endings to "\n".

Peter
Jul 18 '05 #2

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