Complicated string substitution

[Horacius ReX]

Hi,

I have a file with a lot of the following ocurrences:

denmark.handa.1-10
denmark.handa.1-12344
denmark.handa.1-4
denmark.handa.1-56

....

distributed randomly in a file. I need to convert each of this
ocurrences to:

denmark.handa.1-10_1
denmark.handa.1-12344_1
denmark.handa.1-4_1
denmark.handa.1-56_1

so basically I add "_1" at the end of each ocurrence.

I thought about using sed, but as each "root" is different I have no
clue how to go through this.

Any suggestion ?

Thanks in advance.

 

[Tim Chase]

I have a file with a lot of the following ocurrences:

denmark.handa.1-10
denmark.handa.1-12344
denmark.handa.1-4
denmark.handa.1-56

Each on its own line? Scattered throughout the text? With other
content that needs to be un-changed? With other stuff on the
same line?

denmark.handa.1-10_1
denmark.handa.1-12344_1
denmark.handa.1-4_1
denmark.handa.1-56_1

so basically I add "_1" at the end of each ocurrence.

I thought about using sed, but as each "root" is different I have no
clue how to go through this.

How are the roots different? Do they all begin with
"denmark.handa."? Or can the be found by a pattern of "stuff
period stuff period number dash number"?

A couple sed solutions, since you considered them first:

sed '/denmark\.handa/s/$/_1/'
sed 's/denmark\.handa\.\d+-\d+/&_1/g'
sed 's/[a-z]+\.[a-z]+\.\d+-\d+/&_1/g'

Or are you just looking for "number dash number" and want to
suffix the "_1"?

sed 's/\d+-\d+/&_1/g'

Most of the sed versions translate pretty readily into Python
regexps in the .sub() call.

import re
r = re.compile(r'[a-z]+\.[a-z]+\.\d+-\d+')
out = file('out.txt', 'w')
for line in file('in.txt'):
out.write(r.sub(r'\g<0>_1', line))
out.close()

Tweak the regexps accordingly.

-tkc