Re: I can do it in sed...
On Thu, 17 Mar 2005 18:37:11 -0500, Kotlin Sam <[EMAIL PROTECTED]> wrote: >Thanks to everyone who answered my two questions. I have only submitted >questions twice, and on both occasions the solutions were excellent, >and, I'm emarrassed to say, much simpler than I thought they would be. > >My next goal is to be able to help someone they way y'all have helped me. > Bravo. That's the spirit. For even better appreciation of your future efforts, consider not top-posting ;-) >Thanks again, >Lance > >Kent Johnson wrote: >> Kotlin Sam wrote: >> >>> Also, I frequently use something like s/^[A-Z]/~&/ to pre-pend a >>> tilde or some other string to the beginning of the matched string. I >>> know how to find the matched string, but I don't know how to change >>> the beginning of it while still keeping the matched part. >> >> >> Something like >> re.sub(r'^([A-Z])', r'~\1', target) >> should do it. >> >> Kent > Regards, Bengt Richter -- http://mail.python.org/mailman/listinfo/python-list
Re: I can do it in sed...
Thanks to everyone who answered my two questions. I have only submitted questions twice, and on both occasions the solutions were excellent, and, I'm emarrassed to say, much simpler than I thought they would be. My next goal is to be able to help someone they way y'all have helped me. Thanks again, Lance Kent Johnson wrote: Kotlin Sam wrote: Also, I frequently use something like s/^[A-Z]/~&/ to pre-pend a tilde or some other string to the beginning of the matched string. I know how to find the matched string, but I don't know how to change the beginning of it while still keeping the matched part. Something like re.sub(r'^([A-Z])', r'~\1', target) should do it. Kent -- http://mail.python.org/mailman/listinfo/python-list
Re: I can do it in sed...
Kotlin Sam wrote: Also, I frequently use something like s/^[A-Z]/~&/ to pre-pend a tilde or some other string to the beginning of the matched string. I know how to find the matched string, but I don't know how to change the beginning of it while still keeping the matched part. Something like re.sub(r'^([A-Z])', r'~\1', target) should do it. Kent -- http://mail.python.org/mailman/listinfo/python-list
Re: I can do it in sed...
On Wed, 16 Mar 2005 19:06:40 -0600, rumours say that Terry Hancock
<[EMAIL PROTECTED]> might have written:
>You mean you have a text file and you want to find all the lines between
>a line starting with "start" and one starting with "end".
>lines = open('myfile', 'r').readlines()
>printing = 0
>for line in lines:
>if line[:5]=='start': printing=1
>if line[:3]=='end': printing=0
>if printing: print line
suggested order to mimic sed functionality:
>if line[:5]=='start': printing=1
>if printing: print line
>if line[:3]=='end': printing=0
and perhaps it's better to use startswith than slicing.
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"Be strict when sending and tolerant when receiving." (from RFC1958)
I really should keep that in mind when talking with people, actually...
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Re: I can do it in sed...
> "John" == John Machin <[EMAIL PROTECTED]> writes: John> You can get gnu Windows versions of awk sed and most other John> suchlike goodies off the net ... Yeah, google for 'unxutils'. Cygwin versions of these tools can be a headache sometimes. -- Ville Vainio http://tinyurl.com/2prnb -- http://mail.python.org/mailman/listinfo/python-list
Re: I can do it in sed...
> "Damjan" == Damjan <[EMAIL PROTECTED]> writes:
Damjan> Or, much nicer
>> if line[:5]=='start': printing=1
Damjan> if line.startswith('start'): printing=1
>> if line[:3]=='end': printing=0
Damjan> if line.endswith('end'): printing=0
No, it's still line.startswith('end'), not endswith.
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Re: I can do it in sed...
Or, much nicer
> if line[:5]=='start': printing=1
if line.startswith('start'): printing=1
> if line[:3]=='end': printing=0
if line.endswith('end'): printing=0
--
damjan
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Re: I can do it in sed...
Kotlin Sam wrote: > I have spent so much time using sed and awk that I think that way. Now, > when I have to do some Python things, I am having to break out of my > sed-ness and awk-ness, and it is causing me problems. I'm trying. Honest! > > Here are the two things that I'm trying to do: > In sed, I can print every line between ^start to ^end by using > /^start/,/^end/p. It's quick, easy, and doesn't take much time. Is there > a way to do this easily in Python? > > Also, I frequently use something like s/^[A-Z]/~&/ to pre-pend a tilde > or some other string to the beginning of the matched string. I know how > to find the matched string, but I don't know how to change the beginning > of it while still keeping the matched part. > > If I were able to stay in the *nix environment for all my work, I could > do it with these tools and the beloved pipe(|), but that isn't my lot in > life. I would do it in Perl, but, frankly, it gives me headaches even > looking at it. You can get gnu Windows versions of awk sed and most other suchlike goodies off the net ... -- http://mail.python.org/mailman/listinfo/python-list
Re: I can do it in sed...
On Wednesday 16 March 2005 06:01 pm, Kotlin Sam wrote:
> Here are the two things that I'm trying to do:
> In sed, I can print every line between ^start to ^end by using
> /^start/,/^end/p. It's quick, easy, and doesn't take much time. Is there
> a way to do this easily in Python?
You mean you have a text file and you want to find all the lines between
a line starting with "start" and one starting with "end".
REs are not your best method here, just do something like this:
lines = open('myfile', 'r').readlines()
printing = 0
for line in lines:
if line[:5]=='start': printing=1
if line[:3]=='end': printing=0
if printing: print line
Or something like that. I'm sure there are cleverer ways, but
that should do what you ask for.
Cheers,
Terry
--
--
Terry Hancock ( hancock at anansispaceworks.com )
Anansi Spaceworks http://www.anansispaceworks.com
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I can do it in sed...
I have spent so much time using sed and awk that I think that way. Now, when I have to do some Python things, I am having to break out of my sed-ness and awk-ness, and it is causing me problems. I'm trying. Honest! Here are the two things that I'm trying to do: In sed, I can print every line between ^start to ^end by using /^start/,/^end/p. It's quick, easy, and doesn't take much time. Is there a way to do this easily in Python? Also, I frequently use something like s/^[A-Z]/~&/ to pre-pend a tilde or some other string to the beginning of the matched string. I know how to find the matched string, but I don't know how to change the beginning of it while still keeping the matched part. If I were able to stay in the *nix environment for all my work, I could do it with these tools and the beloved pipe(|), but that isn't my lot in life. I would do it in Perl, but, frankly, it gives me headaches even looking at it. Any ideas? Thanks, Lance -- http://mail.python.org/mailman/listinfo/python-list
