[MacPorts] #64707: _tkinter.TclError: no display name and no $DISPLAY environment variable

[MacPorts]

#64707: _tkinter.TclError: no display name and no $DISPLAY environment variable
-----------------------------------+--------------------------
 Reporter:  programmingkidx        |      Owner:  (none)
     Type:  defect                 |     Status:  new
 Priority:  Normal                 |  Milestone:
Component:  ports                  |    Version:
 Keywords:  $DISPLAY tkinter idle  |       Port:  py39-tkinter
-----------------------------------+--------------------------
 I installed the py39-tkinter port and tried to run idle. What happened is
 I saw this error message in Python3.9:

 Traceback (most recent call last):
   File "/opt/local/bin/idle", line 5, in <module>
     main()
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/idlelib/pyshell.py",
 line 1490, in main
     root = Tk(className="Idle")
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/tkinter/__init__.py",
 line 2270, in __init__
     self.tk = _tkinter.create(screenName, baseName, className,
 interactive, wantobjects, useTk, sync, use)
 _tkinter.TclError: no display name and no $DISPLAY environment variable


 My info:

 Core i7 MacBook Pro

 Mac OS 10.14.6

 Python 3.9

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Ticket URL: <https://trac.macports.org/ticket/64707>
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