Data conversion isn't a problem. There is a module called "struct" made to move data between Python and C-structures. Part of Python since ever. I'm using this to transport data between Poser and external Apps.

Try this:

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import struct

X=1.2345
Y=3.567890
Z=7.3434673453

packedpoint=struct.pack("3f",X,Y,Z)
print packedpoint, len(packedpoint)

print struct.calcsize("3f")
X,Y,Z = struct.unpack("3f",packedpoint)

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"3f" means: 3 floats. See http://docs.python.org/lib/module-struct.html

Above the 3 float vars (X,Y,Z) are packed in one string (packedpoint). The needed length of the string is explored via "calcsize()".

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