On 2016-08-17 16:53, Simon King wrote:
So, does the cohomology spkg qualify as an "independent" Python module?
Perhaps it *could* be a independent Python module. One thing which is
not clear to me is to what extent your package would need changes to
Sage itself. If you need to make non-trivial changes to Sage itself to
work with your package, it means that your package interacts with Sage
and it would be more likely a good idea to move it to Sage. If your
package uses Sage but not the other way around, it is more likely a good
idea to make it a separate package. (This is my opinion, not a hard fact)
If it does, several questions arise:
1. Why is "sage -pip install my_tarball.tgz" better than "sage -p
my_tarball.spkg"?
Mainly because Python packages are more standard than Sage packages.
It's a well-known thing, unlike Sage packages. A Python package can be
installed by standard tools like pip.
3. A major pain in the neck are "internal" changes in Sage that used to
break my old-style spkg. Would it be easier to cope with them when
using pip or when putting the Cython code into the Sage tree or when
keeping it as an old-style spkg?
You will have the least problems by having the code in Sage itself. A
Python package will be the same as a Sage package in this regard.
2. How to make the package pip-installable? Can you point me to a
"howto" that also addresses interrelations with Sage, as mentioned
above?
A general howto on Python packaging:
https://packaging.python.org/distributing/
I don't see why the interrelations with Sage would be such a problem.
The dependency of your package on Sage should not be much different from
any other dependency: just (c)import whatever you need from Sage. There
are probably some details that I am overlooking, but I expect those to
be easily fixed.
Jeroen.
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