How can i do this in Python?

[NoName]

perl -ane "print join(qq(\t),@F[0,1,20,21,2,10,12,14,11,4,5,6]).qq(\n)"
file.txt

-a autosplit mode with -n or -p (splits $_ into @F)
-n assume "while (<>) { ... }" loop around program

[Jerry]

Well, the python interpreter has no equivalent to -n or -a in the perl
interpreter. You'd have to implement it using an actual while loop and
because of the indention sensitivity in Python, I don't believe you can
do it on the command line. (I may be very wrong here, but I've not
gotten it to work).

--
Jerry

On Jan 24, 10:25 pm, "NoName" <[e-mail]:

perl -ane "print join(qq(\t),@F[0,1,20,21,2,10,12,14,11,4,5,6]).qq(\n)"
file.txt

-a autosplit mode with -n or -p (splits $_ into @F)
-n assume "while (<>) { ... }" loop around program

[Gabriel Genellina]

At Thursday 25/1/2007 01:25, NoName wrote:

>perl -ane "print join(qq(\t),@F[0,1,20,21,2,10,12,14,11,4,5,6]).qq(\n)"

Must be done on a single line?
I'm not sure if I've got right the behavior - it's been some time
since I quit writing Perl code. The script iterates over all lines
contained on all files specified on the command line; for each line,
splits it on whitespace; then it prints a selected set of fields
(columns 0, 1, 20, 21...) using a tab character as field separator.

=== cut ===
import operator,fileinput

mapper = map(operator.itemgetter, [0,1,20,21,2,10,12,14,11,4,5,6])
for line in fileinput.input():
fields = line.split()
print '\t'.join(m(fields) for m in mapper)
=== cut ===
--
Gabriel Genellina
Softlab SRL


__________________________________________________
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[NoName]

Thanks;)

On 25 Янв., 17:47, Gabriel Genellina <[e-mail]>wrote:

At Thursday 25/1/2007 01:25, NoName wrote:

perl -ane "print join(qq(\t),@F[0,1,20,21,2,10,12,14,11,4,5,6]).qq(\n)"Must be done on a single line?

I'm not sure if I've got right the behavior - it's been some time
since I quit writing Perl code. The script iterates over all lines
contained on all files specified on the command line; for each line,
splits it on whitespace; then it prints a selected set of fields
(columns 0, 1, 20, 21...) using a tab character as field separator.

=== cut ===
import operator,fileinput

mapper = map(operator.itemgetter, [0,1,20,21,2,10,12,14,11,4,5,6])
for line in fileinput.input():
Â* Â* Â*fields = line.split()
Â* Â* Â*print '\t'.join(m(fields) for m in mapper)
=== cut ===

--
Gabriel Genellina
Softlab SRL

__________________________________________________
Preguntá. Respondé. DescubrÃ*.
Todo lo que querÃ*as saber, y lo que ni imaginabas,
está en Yahoo! Respuestas (Beta).
¡Probalo ya!http://www.yahoo.com.ar/respuestas

[bearophileHUGS]

Gabriel Genellina:

import operator,fileinput
mapper = map(operator.itemgetter, [0,1,20,21,2,10,12,14,11,4,5,6])
for line in fileinput.input():
fields = line.split()
print '\t'.join(m(fields) for m in mapper)

I'm just curious, what's the advantage of using itemgetter there
compared to something simpler like this (untested!)?

import fileinput
positions = [0,1,20,21,2,10,12,14,11,4,5,6]
for line in fileinput.input():
fields = line.split()
print '\t'.join(fields[m] for m in positions)

Bye,
bearophile

[Gabriel Genellina]

<be************@lycos.comescribió en el mensaje
news:11**********************@v33g2000cwv.googlegr oups.com...

I'm just curious, what's the advantage of using itemgetter there
compared to something simpler like this (untested!)?

None!

--
Gabriel Genellina