#20815: libbraiding as an optional package.
-------------------------------------+-------------------------------------
       Reporter:  mmarco             |        Owner:
           Type:  enhancement        |       Status:  needs_work
       Priority:  major              |    Milestone:  sage-7.3
      Component:  packages:          |   Resolution:
  optional                           |    Merged in:
       Keywords:                     |    Reviewers:
        Authors:  Miguel Marco       |  Work issues:
Report Upstream:  N/A                |       Commit:
         Branch:                     |  aee2f4d521172fa9d8881af15657cd29e3b7385b
  u/mmarco/libbraiding_as_an_optional_package_|     Stopgaps:
   Dependencies:                     |
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Comment (by jdemeyer):

 Replying to [comment:16 mmarco]:
 > Ok. Does it make sense to  put it in the braid methods?

 Yes, but

 1. avoid `is_package_installed`, use `except ImportError` instead.
 2. use the `PackageNotFoundError` exception instead of
 `NotImplementedError`.

--
Ticket URL: <http://trac.sagemath.org/ticket/20815#comment:18>
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