Looking for a Python Program/Tool That Will Add Line Numbers to atxt File

[thebjorn]

Re: Looking for a Python Program/Tool That Will Add Line Numbers to atxt File

On Feb 15, 8:55 pm, Jeff Schwab <j...@schwabcen ter.comwrote:

W. Watson wrote:

See Subject. It's a simple txt file, each line is a Python stmt, but I
need up to four digits added to each line with a space between the
number field and the text. Perhaps someone has already done this or
there's a source on the web for it. I'm not yet into files with Python.
A sudden need has burst upon me. I'm using Win XP.

>
i = 0
for line in sys.stdin:
i += 1
print i, line,
>
Or if you want consistent alignment:
>
i = 0
for line in sys.stdin:
i += 1
print "%4s" % i, line,

I like your version best (it's very clean and easy to understand), but
here's a few more versions...

from itertools import count

for i, line in zip(count(1), open('filename. txt')):
print i, line,

or with consistent alignment:

for x in zip(count(1), open('filename. txt')):
print "%4d %s" % x,

the latter version gives rise to a one-liner

open('output.tx t','w').writeli nes('%4d %s' % x for x in
zip(count(1), open('perms.py' )))

but as I said, I like the simple for loop the best ;-)

-- bjorn

[Michael Wronna]

Re: Looking for a Python Program/Tool That Will Add Line Numbers toa txt File



On Thu, 14 Feb 2008, W. Watson wrote:

See Subject. It's a simple txt file, each line is a Python stmt, but I need
up to four digits added to each line with a space between the number field
and the text. Perhaps someone has already done this or there's a source on
the web for it. I'm not yet into files with Python. A sudden need has burst
upon me. I'm using Win XP.
--
Wayne Watson (Nevada City, CA)
>
Web Page: <speckledwithSt ars.net>
>

Hi Wayne, sorry for that: Change OS, and type cat -n program.py >
numbered.py
Just joking, Mike

[William Pursell]

Re: Looking for a Python Program/Tool That Will Add Line Numbers to atxt File

On Feb 14, 6:54 am, "W. Watson" <wolf_tra...@in valid.comwrote:

See Subject. It's a simple txt file, each line is a Python stmt, but I need
up to four digits added to each line with a space between the number field
and the text. Perhaps someone has already done this or there's a source on
the web for it. I'm not yet into files with Python. A sudden need has burst
upon me. I'm using Win XP.

Not sure if "Python program/tool" means "a tool or a program
in Python", but if awk is okay, that's the tool I would use:

awk '{printf( "%4d %s\n", NR % 10000, $0 )}'

[Reedick, Andrew]

RE: Looking for a Python Program/Tool That Will Add Line Numbers toatxt File

-----Original Message-----

From: python-list-bounces+jr9445= att.com@python. org [mailto:python-
list-bounces+jr9445= att.com@python. org] On Behalf Of William Pursell
Sent: Monday, February 18, 2008 8:37 AM
To: python-list@python.org
Subject: Re: Looking for a Python Program/Tool That Will Add Line
Numbers to atxt File

On Feb 14, 6:54 am, "W. Watson" <wolf_tra...@in valid.comwrote:

See Subject. It's a simple txt file, each line is a Python stmt, but

I need

up to four digits added to each line with a space between the number

field

and the text. Perhaps someone has already done this or there's a

source on

the web for it. I'm not yet into files with Python. A sudden need

has

burst

upon me. I'm using Win XP.

Not sure if "Python program/tool" means "a tool or a program
in Python", but if awk is okay, that's the tool I would use:

awk '{printf( "%4d %s\n", NR % 10000, $0 )}'

On a related note, since it's probably easier to install Perl instead of
awk on a windows box:

type foo.java | perl -ne "$counter++ ; print sprintf(qq(%4d ), $counter),
$_;"