#14767: Fix import_statements for lazy imported objects
----------------------------+-----------------------------------------------
Reporter: tmonteil | Owner: jason
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.11
Component: misc | Resolution:
Keywords: days49 | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Changes (by vdelecroix):
* status: new => needs_review
Old description:
> Here is an example:
> {{{
> sage: import_statements('NN')
> from sage.misc.lazy_import import NN
> sage: from sage.misc.lazy_import import NN
> ...
> ImportError: cannot import name NN
> }}}
>
> That's because `NN` is a not-yet-resolved lazy imported object.
>
> However, it is able to answer correctly with a bit of help:
>
> {{{
> sage: import_statements('NN', lazy=True)
> from sage.misc.lazy_import import lazy_import
> lazy_import('sage.misc.lazy_import', 'NN')
> sage: from sage.misc.lazy_import import lazy_import
> sage: lazy_import('sage.misc.lazy_import', 'NN'
> }}}
>
> By the way, the default value for ``lazy`` could possibly be set to
> True for lazy imported objects.
New description:
Here is an example:
{{{
sage: import_statements('NN')
from sage.misc.lazy_import import NN
sage: from sage.misc.lazy_import import NN
...
ImportError: cannot import name NN
}}}
That's because `NN` is a not-yet-resolved lazy imported object.
solution 1: the default value for ``lazy`` could possibly be set to True
for lazy imported objects (original proposition of the ticket)
solution 2: if the object is a `LazyImport` then get the corresponding
object with `._get_object`
(solution implemented in the ticket)
With the patch applied
{{{
sage: import_statements(NN)
from sage.rings.semirings.non_negative_integer_semiring import NN
sage: import_statements('NN')
from sage.rings.semirings.non_negative_integer_semiring import NN
}}}
--
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14767#comment:3>
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