help in converting perl re to python re

[eight02645999@yahoo.com]

hi

i have some regular exp code in perl that i want to convert to python.


if $line =~ m#<(tag1)>(.*)</\1>#
{
$variable = $2;
}

the perl code finds a line that matches something like

"<tag1>sometext <\tag1>" in the line and then assign $variable the value
of "sometext"

how can i do an equivalent of that using re module?
thanks

[Joel Hedlund]

Re: help in converting perl re to python re

Hi

[color=blue]
> the perl code finds a line that matches something like
> "<tag1>sometext <\tag1>" in the line and then assign $variable the value
> of "sometext"[/color]

No, but if you use a closing </tag1> instead of <\tag1> it does. You had me scratching my head for a while there. :-)

This should do it in python:

------------------------------------------------
#!/usr/bin/python

import re

regexp = re.compile(r"<( tag1)>(.*)</\1>")
line = "<tag1>sometext </tag1>"
match = regexp.search(l ine)

if match:
variable = match.group(2)

------------------------------------------------

Good luck!
/Joel Hedlund


eight02645999@y ahoo.com wrote:[color=blue]
> hi
>
> i have some regular exp code in perl that i want to convert to python.
>
>
> if $line =~ m#<(tag1)>(.*)</\1>#
> {
> $variable = $2;
> }
>
> the perl code finds a line that matches something like
>
> "<tag1>sometext <\tag1>" in the line and then assign $variable the value
> of "sometext"
>
> how can i do an equivalent of that using re module?
> thanks
>[/color]

[Sybren Stuvel]

Re: help in converting perl re to python re

Joel Hedlund enlightened us with:[color=blue]
> regexp = re.compile(r"<( tag1)>(.*)</\1>")[/color]

I'd go for

regexp = re.compile(r"<( tag1)>(.*?)</\1>")

Otherwise this:

line = "<tag1>sometext </tag1><tag1>othe rtext</tag1>"
match = regexp.search(l ine)

will result in 'sometext</tag1><tag1>othe rtext'

Sybren
--
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself?
Frank Zappa

[Joel Hedlund]

Re: help in converting perl re to python re

> I'd go for[color=blue]
> regexp = re.compile(r"<( tag1)>(.*?)</\1>")[/color]

Indeed. I second that.

/Joel

[Mitja Trampus]

Re: help in converting perl re to python re

>> i have some regular exp code in perl that i want to convert to python.[color=blue][color=green]
>> if $line =~ m#<(tag1)>(.*)</\1>#
>> {
>> $variable = $2;
>> }[/color][/color]
[color=blue]
> regexp = re.compile(r"<( tag1)>(.*)</\1>")
> line = "<tag1>sometext </tag1>"
> match = regexp.search(l ine)
> if match:
> variable = match.group(2)[/color]

Or, if you prefer shorter, quick-and-dirty syntax closer to perl's approach:

match = re.search(r"<(t ag1)>(.*)</\1>", line)
if match: variable = match.group(2)