Python 3 transition question

[Martin Kelly <martin@martingkelly.com>]

Hi,

I maintain python-gmpy and python-gmpy2, which need to transition to 
Python 3. However, they have several packages that have Suggests or 
Recommends (not a hard dependency) pointing to python-gmpy/python-gmpy2. 
These other packages appear to be Python 2 only.

Should I stop building the Python 2 versions of these packages (and 
invalidate the Suggests/Recommends of these other packages), or should I 
instead just document this issue? If I document it, where should this 
documentation go?

Thanks,
Martin