[MacPorts] #40757: py27-mayavi @4.2.0 doesn't work with ipython

[MacPorts]

#40757: py27-mayavi @4.2.0 doesn't work with ipython
-------------------------+-------------------------
  Reporter:  pgnmrc69@…  |      Owner:  jjstickel@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.2.0
Resolution:              |   Keywords:
      Port:  py-mayavi   |
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Comment (by jjstickel@…):

 It works for me. Variants can make a big difference in successful
 operation for these. I have:
 {{{
 $ port installed vtk5 py27-pyface py27-mayavi py27-ipython
 The following ports are currently installed:
   py27-ipython @1.1.0_0+notebook+parallel+pyqt4+scientific (active)
   py27-mayavi @4.2.0_0 (active)
   py27-pyface @4.2.0_0+pyqt4 (active)
   vtk5 @5.10.1_0+python27 (active)
 }}}
 You need +python27 for vtk5 and +pyqt4 for both py27-pyface and
 py27-ipython.

 Also note, you will likely need to do "export QT_API=pyqt" before running
 ipython (not for your current bug, but it resolves the "ValueError: API
 'QString' has already been set to version 1" that you may get after you
 set the variants correctly).

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Ticket URL: <https://trac.macports.org/ticket/40757#comment:2>
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