Generic communications module with a little help from classes...

Hi,
What I want to do is create a module that offers a generic set of
functions (send, recieve, etc...) and reffers the request to the
correct module (rs-232, tcp/ip, etc..).
I want all this to be unseen by the script that calls this module.
I want the script to specify the communication type, and then be able
to use the functions. In the future, when the whole script will work on
a different type of communication all that will be changed is the type
of communication property.
How do I do this?

I thought of a few possibilities:
1. all communication modules will have the same function names and same
number of params (problematic), and then it will look like this:

class module1:
def send(self):
# send one way

class module2:
def send(self):
# send the other
if X:
selected = module1
else:
selected = module2

class main(selected):
pass

m = main()
m.send()

2. the other option is creating a "wrapper" class for each module. this
class takes the generic params of the function "send" and organizes the
params and name so it will be compatible with the comm module:

class a:
def send(self, what):
module1.sendCMD(what)

class b:
def send(self, what):
module2.SEND(what)

if X:
selected = a
else:
selected = b

class main(selected):
pass

m = main()
m.send()

#############
which way is better? any better ideas?

thanks.

.

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