perl or python tools for svn branching or tagging? (wrapper)

My experience is in perl, but willing to consider other
scripting languages. Is there popular stable svn scripting
library module for perl, python or ruby that we should be
considering:

Goal: write simple svn wrapper script for branching or tagging in
perl, python or ruby

my requirements:

  Write a simple command-line script probably under 100 lines
  that supports these actions:

    - create a specified svn branch
    - create a specified svn tag. (Possibly deducing tag location
      by swapping "trunk" with "tags".)

  support svn 1.6 repository or later

  Script to be invoked on the svn server for speed and per current
  "in house" policy.

  I have been asked to use a library approach, instead of directly
  calling (for ex) 'svn copy', because of the value that may added
  by the library method, and because the script may be easier to
  maintain and extend.

Is there a popular stable svn scripting library module for perl,
python or ruby that we should be considering?

--
thanks,
Tom
--
Here are the cpan modules I'm looking at:
  http://www.connotea.org/user/zfyarpe/tag/tmp-9fz
Here is a the larger list I first considered:
  http://www.connotea.org/user/zfyarpe/tag/svn-cpan
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