calling server side function

[Paul Hartley]

I have a socket set up between a client and server program.  Let's say that I serialize (pickle) some data in the client and send it to the server with the intention of calling a function in the server to process the data.  How would one execute the function?  This is not for a web-based application, BTW -- it's a desktop based application
My current thought process is (using a generalized example):
I have a list of numbers in the client and want to find the length of the list using the server.  There exists a function find_len() in the server code.  I have a list of numbers [1,2,3].  On the client side, I create the tuple ("find_len", [1,2,3]), and serialize it.  I pass this serialized object via a socket to the server, which unpickles it.  The server takes the key (find_len) and uses a getattr call to get the find_len function.  The server then calls find_len([1,2,3]) to get the sum.
def find_len(list_):    return
Are there better ways of accomplishing this (I'm aware that there are security pitfalls here...)

 		 	   		  
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