On 28/4/13 at 20:13, [email protected] (LuKreme) wrote:
I have a file that looks like this:
123456 "/path/to/file name/with spaces"
with several thousand lines.
I want to run a text-factory that gets the number, runs it
through a bit of python code, and replaces it with the result
without touching the rest of the line. So I would end up with
something like
8578810 "/path/to/file name/with spaces"...
Use a Text Filter, not a factory. I don't know Python, but the
process will be very similar to the Perl routine below. Here I
have used a subroutine for the math stuff in case it's lengthy:
#!/usr/bin/perl
use strict;
while (<>) { # read the text line by line
my $number;
if (/^\d+/) { # if a string of digits begins the line
my $changed_number = ChangeNumber($&); # process the found item
s/$number/$changed_number/; # substitute the calculated replacement
}
print ; # replace the line with the modified line
}
sub ChangeNumber {
return $_[0] * 2; # multiply the first parameter by 2
}
#JD
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