[MacPorts] #65145: plotting problem using py39-matplotlib @3.5.2_0 in IPython with %matplotlib

[MacPorts]

#65145: plotting problem using py39-matplotlib @3.5.2_0 in IPython with %matplotlib
---------------------------------+---------------------------
 Reporter:  aaronm6              |      Owner:  (none)
     Type:  defect               |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:  2.7.2
 Keywords:  matplotlib, ipython  |       Port:  py-matplotlib
---------------------------------+---------------------------
 Using py39-matplotlib @3.5.2_0 with IPython (py39-ipython @8.2.0_1) and
 invoking the matplotlib inline display hook via `%matplotlib`, is causing
 a plot-display issue.  A figure can be opened, and will accept a plot
 statement without complaint; however, nothing shows on the plot, until one
 uses a graphical tool in the plot window (e.g. the zoom tool). The problem
 does not occur with py39-matplotlib @3.5.1_0 (in this version, the plot
 will be displayed as usual).  Here are some example commands:

 {{{
 $ ipython3-3.9
 Python 3.9.12 (main, Mar 25 2022, 04:56:27)
 Type 'copyright', 'credits' or 'license' for more information
 IPython 8.2.0 -- An enhanced Interactive Python. Type '?' for help.

 In [1]: %matplotlib
 Using matplotlib backend: MacOSX

 In [2]: from matplotlib import pyplot as plt

 In [3]: plt.figure()  # (a blank figure window is created)
 Out[3]: <Figure size 1280x960 with 0 Axes>

 In [4]: plt.plot([1,2,3],[1,2,3],'.')
 Out[4]: [<matplotlib.lines.Line2D at 0x13f3540d0>]
 }}}

 Nothing happens; figure window still appears blank.  Note that the
 `%matplotlib` command invokes the inline display hook, and therefore
 plotting does not require `plt.show()`.  With earlier matplotlib versions
 (including 3.5.1_0) the three desired data points, and plot axes, are
 shown as expected.

 No problems observed when not invoking the inline display hook (i.e.
 `%matplotlib`)

 Using macOS version 11.6.5

-- 
Ticket URL: <https://trac.macports.org/ticket/65145>
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