perl -pi.bak -e equivalent

[Caj Zell]

Hello,

I am looking a little bit at python and am curious of one thing I
often use in perl. Suppose, I want to change the string
"best_compo ser" to "Zappa" in a document called facts.txt, then in
perl I would do

perl -pi.bak -e "s/best_composer/Zappa/;" facts.txt

Can I do that with python from the command line so easily?

Caj Zell

[Diez B. Roggisch]

Re: perl -pi.bak -e equivalent

Caj Zell wrote:
[color=blue]
> Hello,
>
> I am looking a little bit at python and am curious of one thing I
> often use in perl. Suppose, I want to change the string
> "best_compo ser" to "Zappa" in a document called facts.txt, then in
> perl I would do
>
> perl -pi.bak -e "s/best_composer/Zappa/;" facts.txt
>
> Can I do that with python from the command line so easily?[/color]

Short answer: No. Perl is designed for this kind of stuff. Python won't
catch up in that field, for various reasons. There have been plenty of
discussions on the subject of one-liners in python - googl.groups will show
you to them.

As always, its important to use the right tool for the job - and in this
case, I'd even go for sed :)

sed s/best_composer/Zappa/ < facts.txt > pi.bak

is even shorter...

--
Regards,

Diez B. Roggisch

[gabriele renzi]

Re: perl -pi.bak -e equivalent

Diez B. Roggisch ha scritto:
[color=blue]
> Caj Zell wrote:
>
>[color=green]
>>Hello,
>>
>>I am looking a little bit at python and am curious of one thing I
>>often use in perl. Suppose, I want to change the string
>>"best_compose r" to "Zappa" in a document called facts.txt, then in
>>perl I would do
>>
>>perl -pi.bak -e "s/best_composer/Zappa/;" facts.txt
>>
>>Can I do that with python from the command line so easily?[/color]
>
>
> Short answer: No. Perl is designed for this kind of stuff. Python won't
> catch up in that field, for various reasons. There have been plenty of
> discussions on the subject of one-liners in python - googl.groups will show
> you to them.
>
> As always, its important to use the right tool for the job - and in this
> case, I'd even go for sed :)
>
> sed s/best_composer/Zappa/ < facts.txt > pi.bak
>
> is even shorter...[/color]

let me suggest pyone:

http://www.unixuser.org/~euske/pyone/

It is really an erethic twist of python, anyway

PS
the perl code does not do the same thing than the sed one, it creates a
backup file named facts.txt.bak and changes facts.txt

[Caj Zell]

Re: perl -pi.bak -e equivalent

"Diez B. Roggisch" <deetsNOSPAM@we b.de> wrote in message news:<cnngpb$qt m$05$3@news.t-online.com>...[color=blue]
> Caj Zell wrote:
>[color=green]
> > Hello,
> >
> > I am looking a little bit at python and am curious of one thing I
> > often use in perl. Suppose, I want to change the string
> > "best_compo ser" to "Zappa" in a document called facts.txt, then in
> > perl I would do
> >
> > perl -pi.bak -e "s/best_composer/Zappa/;" facts.txt
> >
> > Can I do that with python from the command line so easily?[/color]
>
> Short answer: No. Perl is designed for this kind of stuff. Python won't
> catch up in that field, for various reasons. There have been plenty of
> discussions on the subject of one-liners in python - googl.groups will show
> you to them.[/color]


OK, I did some googling on "perl command line -e python equivalent"
and various combinations, but didn't think of the obvious "perl
one-liner python equivalent" your answer implies. With that I want to
say that I did try before posting here.

Nice to see noone challenges the musical meaning of my search and
replace example, seems like you pythoners have pretty good taste.

Caj Zell