asterisk users - Mar 2015 - convert asterisk extensions to single numbers

hi,

i'm converting extensions.conf to DB routing. can you help me with 
regexp or something which converts dialplan to single numbers like _3X0 
to 310,320,330,340,... ?

i found only https://pypi.python.org/pypi/asterisk_dialplan/0.1.2 but i 
need the opposite direction

thanks

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Marek Cervenka
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