> Yes, it uses base 2**15 but it's not the correct conversion to base 
> 2**15. You convert each PyLong digit to base 2**15 but not the whole 
> number.

I don't understand:  yes, each base 2**30 digit is converted to a pair 
of base 2**15 digits, and if necessary (i.e., if the top 15 bits of the 
most significant base 2**30 digit are zero) the size is adjusted.  How 
is this not converting the whole number?

> As a result, the format is different than the current mashal version.

Can you give an example of an integer n such that marshal.dumps(n) gives 
you different results with and without the patch?  As far as I can tell, 
I'm getting the same marshal results both with the unpatched version and 
with the patch applied.