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

[W. Watson]

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>

[Chris]

On Feb 14, 8:54 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.
--
Wayne Watson (Nevada City, CA)

Web Page: <speckledwithSt ars.net>

enumerate through the file which will yield you a counter (starting @
zero so just add 1) and use the string function .zfill() to pad it out
for you.
eg.

for (line_cnt, each_line) in enumerate(input _file):
output_file.wri te(print ('%s '%(line_cnt+1)) .zfill(5) + each_line)
output_file.clo se()
input_file.clos e()

[John Machin]

On Feb 14, 6:13 pm, Chris <cwi...@gmail.c omwrote:

On Feb 14, 8:54 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.
--
Wayne Watson (Nevada City, CA)

Web Page: <speckledwithSt ars.net>

enumerate through the file which will yield you a counter (starting @
zero so just add 1) and use the string function .zfill() to pad it out
for you.
eg.

for (line_cnt, each_line) in enumerate(input _file):
output_file.wri te(print ('%s '%(line_cnt+1)) .zfill(5) + each_line)

(1) What's that "print" doing in there?
(2) zfill(5)? The OP asked for "up to 4 digits", not 5.
(2) As an alternative to str.zfill, consider using formatting:

output_file.wri te('%04d %s' % (line_cnt+1, each_line))

And what does "up to 4" mean? What does the OP want the 10000th line
to look like?

[Chris]

On Feb 14, 1:29 pm, John Machin <sjmac...@lexic on.netwrote:

On Feb 14, 6:13 pm, Chris <cwi...@gmail.c omwrote:

On Feb 14, 8:54 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.
--
Wayne Watson (Nevada City, CA)

Web Page: <speckledwithSt ars.net>

enumerate through the file which will yield you a counter (starting @
zero so just add 1) and use the string function .zfill() to pad it out
for you.
eg.

for (line_cnt, each_line) in enumerate(input _file):
output_file.wri te(print ('%s '%(line_cnt+1)) .zfill(5) + each_line)

(1) What's that "print" doing in there?
(2) zfill(5)? The OP asked for "up to 4 digits", not 5.
(2) As an alternative to str.zfill, consider using formatting:

output_file.wri te('%04d %s' % (line_cnt+1, each_line))

And what does "up to 4" mean? What does the OP want the 10000th line
to look like?

print was a typo
take a look at the string that is built before the zfill fires, it has
a trailing space so it is correct. ;)

[W. Watson]

Thanks. I found this to work:

input_file=open ('junkin.txt',' r')
output_file=ope n('junkout.txt' ,'w')
for (line_cnt, each_line) in enumerate(input _file):
output_file.wri te('%4d '%(line_cnt+1)+ each_line)
output_file.clo se()
input_file.clos e()

I removed the print, but ran into trouble with zfill. I thought this might
be more difficult judging by a long ago experience with Java.

Chris wrote:

On Feb 14, 1:29 pm, John Machin <sjmac...@lexic on.netwrote:

>On Feb 14, 6:13 pm, Chris <cwi...@gmail.c omwrote:

>>On Feb 14, 8:54 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.
--
Wayne Watson (Nevada City, CA)
Web Page: <speckledwithSt ars.net>
enumerate through the file which will yield you a counter (starting @
zero so just add 1) and use the string function .zfill() to pad it out
for you.
eg.
for (line_cnt, each_line) in enumerate(input _file):
output_file.wri te(print ('%s '%(line_cnt+1)) .zfill(5) + each_line)

(1) What's that "print" doing in there?
(2) zfill(5)? The OP asked for "up to 4 digits", not 5.
(2) As an alternative to str.zfill, consider using formatting:

output_file.wr ite('%04d %s' % (line_cnt+1, each_line))

And what does "up to 4" mean? What does the OP want the 10000th line
to look like?

print was a typo
take a look at the string that is built before the zfill fires, it has
a trailing space so it is correct. ;)

--
Wayne Watson (Nevada City, CA)

Web Page: <speckledwithSt ars.net>

[J Peyret]

On Feb 14, 8:50 am, "W. Watson" <wolf_tra...@in valid.comwrote:

(snip)

I thought this might be more difficult judging by a long ago experience with Java.

(snip)

+1 QOTW

[Gabriel Genellina]

En Thu, 14 Feb 2008 04:54:56 -0200, W. Watson <wo*********@in valid.com>
escribió:

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.

This command should suffice - but you must first find a working CP/M
system to use it:

C>PIP [N] NEW.PY=OLD.PY

(Sorry - just a a nostalgic flash!)

--
Gabriel Genellina

[W. Watson]

Good grief! You go a long way back. Want to try for an IBM 650 with a drum
memory?

Gabriel Genellina wrote:

En Thu, 14 Feb 2008 04:54:56 -0200, W. Watson <wo*********@in valid.com>
escribió:

>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.

This command should suffice - but you must first find a working CP/M
system to use it:

C>PIP [N] NEW.PY=OLD.PY

(Sorry - just a a nostalgic flash!)

--
Wayne Watson (Nevada City, CA)

Web Page: <speckledwithSt ars.net>

[Jaap Spies]

Gabriel Genellina wrote:

En Thu, 14 Feb 2008 04:54:56 -0200, W. Watson <wo*********@in valid.com>
escribió:

>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.

This command should suffice - but you must first find a working CP/M
system to use it:

C>PIP [N] NEW.PY=OLD.PY

(Sorry - just a a nostalgic flash!)

Wow! You remembered this. Good old PIP!

Jaap

[Gabriel Genellina]

Gabriel Genellina wrote:

>En Thu, 14 Feb 2008 04:54:56 -0200, W. Watson <wo*********@in valid.com>
escribió:

>>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.

>This command should suffice - but you must first find a working CP/M
system to use it:

C>PIP [N] NEW.PY=OLD.PY

(Sorry - just a a nostalgic flash!)

En Thu, 14 Feb 2008 19:47:16 -0200, Jaap Spies <j.*****@hccnet .nl>
escribió:

Wow! You remembered this. Good old PIP!

So powerful... It was one of the first things I learned, perhaps that's
why I still remember it.

En Thu, 14 Feb 2008 18:53:16 -0200, W. Watson <wo*********@in valid.com>
escribió:

Good grief! You go a long way back. Want to try for an IBM 650 with a
drum
memory?

I can't go soooo long back in time :) but I remember having used a
Winchester removable hard drive, maybe 30MB capacity, that made a terrible
noise and had to be powered on a few minutes earlier than the main unit
because it had to "speed up".

--
Gabriel Genellina