#19339: Use digraph labels if present for ClusterAlgebra and ClusterQuiver
-------------------------------------+-------------------------------------
       Reporter:  aram.dermenjian    |        Owner:
           Type:  enhancement        |       Status:  needs_work
       Priority:  minor              |    Milestone:  sage-6.9
      Component:  algebra            |   Resolution:
       Keywords:  cluster, cluster   |    Merged in:
  algebra, quiver, cluster quiver    |    Reviewers:  Aram Dermenjian,
        Authors:  Ben Strasser       |  Emily Gunawan
Report Upstream:  N/A                |  Work issues:
         Branch:                     |       Commit:
  u/benstrasser/19339                |  1aabf461525ff0bcd21b180126b139fb3d3659b7
   Dependencies:                     |     Stopgaps:
-------------------------------------+-------------------------------------

Comment (by tscrim):

 Some quick comments:

 - I believe you want `user_labels` to be a list, so once we switch to
 Python3, the current code won't work. So I recommend (and is also faster):
   {{{
 user_labels = [ZZ(x) if type(x) == int else x for x in user_labels]
   }}}
 - Instead of `elif type(user_labels[i]) in [list,tuple]:`, you should use
 `elif isinstance(user_labels[i], (list, tuple)):` (unless you want to
 explicitly forbid any subclasses of `list` or `tuple`).
 - Python uses different conventions than, e.g., C++/Java. So variables
 `isVertices` should be `is_vertices`.
 - You have an erroneous character:
   {{{#!diff
  For the compendium on the cluster algebra and quiver package see ::
 -
 +f
      http://arxiv.org/abs/1102.4844.

   }}}

--
Ticket URL: <https://trac.sagemath.org/ticket/19339#comment:26>
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