Hello sage-dev,
this week I worked on something which I find quite exciting: a context
("with" statement) for lazy imports. See
https://trac.sagemath.org/ticket/22752
The old lazy import
lazy_import('sage.arith.srange', 'xsrange', 'sxrange', deprecation=20094)
can now be written as
with lazyimport(deprecation=20094):
from sage.arith.srange import xsrange as sxrange
In addition to the syntax change, two more issues are fixed for the new
"lazyimport" context:
1. It works in Cython.
2. Lazy relative imports are supported.
This is implemented by overriding __builtin__.__import__ (which is a
documented way to change the import mechanism).
The motivating reason to improve lazy imports was to work on fixing the
cyclic import problem in Sage (#21636).
Enjoy (and please review),
Jeroen.
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