@parametrize with different scopes per parameter

[amezin]

Why does Metafunc.parametrize() assign one scope to all parameters? Could it be extended to accept a list in scope=?

Instead of cartesian product, I want to generate pairwise combinations (https://pypi.org/project/allpairspy/). But when I apply the generated argument tuples with one .parametrize() call, I can then set the scope only for all parameters/arguments at once. Which either:

a) breaks fixtures
b) causes incorrect sorting order