XML, JSON, or what?

[Daniel Dittmar]

> My client-server is Python-to-Python. At present, I am using cPickle to
> transfer objects between the two. Among other things, I sometimes
> transfer a tuple. Using JSON it appears on the other side as a list. As
> I sometimes use the tuple as a dictionary key, this fails, as you
> obviously cannot use a list as a key.
[...]
> Can someone confirm this, or is there an easy workaround?

You can always convert a list to a tuple using the tuple () builtin 
right before  you use it as a key. But you have to be sure that it is a 
list. tuple ("abc") => ('a', 'b', 'c') is probably not what you intend 
to do.

Daniel