Converting between Python and Perl is not easily done by simple subsitutions, as there are some strong differences between how Python variables and Perl variables work :

1. A Python tuple is immutable - you can't change any part of it - this makes it hard(er) to represent a tuple in Perl with the same semantics (I think of a tied Array as a solution)
2. Python dictionaries take tuples (and not strings) as keys - this makes Perl hashes hard to use for that area, as you have to find a way to encode any tuple to a string and back (I think of URLencoding the tuples and a special marker for the different elements of the tuple)
3. Python knows no explicit references, in fact, everything in Python is a reference - this is not that bad, as Perl also dosen't know complex data structures without references, but in Perl, those references are explicit
4. Python can easily do deep comparision of data, where with Perl you will have to manually recurse through the data - this makes some algorithms nastier to read under Perl

perl -MHTTP::Daemon -MHTTP::Response -MLWP::Simple -e ' ;    # The  
$d = new HTTP::Daemon and fork and getprint $d->url and exit;#spider
($c = $d->accept())->get_request(); $c->send_response( new   #in the
HTTP::Response(200,$_,$_,qq(Just another Perl hacker\n))); ' #  web
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