[Question] v5.0.0 _tkinter.TclError

[Teque5]

Type of Issue (Enhancement, Error, Bug, Question)

Question

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Environment

Operating System

Linux

PySimpleGUI Port (tkinter, Qt, Wx, Web)

tkinter

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Versions

Python version (sg.sys.version)

3.7.17 (3.7, 3.9, 3.12)

PySimpleGUI Version (sg.__version__)

V5.0.0

GUI Version (tkinter (sg.tclversion_detailed), PySide2, WxPython, Remi)

Unknown

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Your Experience In Months or Years (optional)

Python programming experience
Programming experience overall
Have used another Python GUI Framework? (tkinter, Qt, etc) (yes/no is fine)
This project and the users!

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Troubleshooting

These items may solve your problem. Please check those you've done by changing - [ ] to - [X]

• Searched main docs for your problem www.PySimpleGUI.org
• Looked for Demo Programs that are similar to your goal Demos.PySimpleGUI.org
• If not tkinter - looked for Demo Programs for specific port
• For non tkinter - Looked at readme for your specific port if not PySimpleGUI (Qt, WX, Remi)
• Run your program outside of your debugger (from a command line)
• Searched through Issues (open and closed) to see if already reported Issues.PySimpleGUI.org
• Tried using the PySimpleGUI.py file on GitHub. Your problem may have already been fixed but not released

Detailed Description

One of my projects uses PySimpleGUI as a backend and during your recent release of v5.0.0 a few days ago our pipeline broke. Error looks inscrutable to me but we aren't using anything in a fancy way. Similar error on python 3.7, 3.9, and 3.12:

============================= test session starts ==============================
platform linux -- Python 3.7.17, pytest-7.4.4, pluggy-1.2.0
rootdir: /home/runner/work/sigmf-python/sigmf-python
configfile: pyproject.toml
plugins: hypothesis-6.79.4, cov-4.1.0
collected 41 items / 1 error

==================================== ERRORS ====================================
______________________ ERROR collecting sigmf/apps/gui.py ______________________
sigmf/apps/gui.py:11: in <module>
    from PySimpleGUI import *
/opt/hostedtoolcache/Python/3.7.17/x64/lib/python3.7/site-packages/PySimpleGUI/__init__.py:1: in <module>
    from .PySimpleGUI import *
/opt/hostedtoolcache/Python/3.7.17/x64/lib/python3.7/site-packages/PySimpleGUI/PySimpleGUI.py:25954: in <module>

exec(exec(marshal.loads(base64.b64decode(...incredibly long bit omitted...)
obf_Cleaned_PySimpleGUI50_source.py:1423: in <module>
    ???
obf_Cleaned_PySimpleGUI50_source.py:1163: in __3I645HSK
    ???
obf_Cleaned_PySimpleGUI50_source.py:262: in __CUrwMBp
    ???
/opt/hostedtoolcache/Python/3.7.17/x64/lib/python3.7/site-packages/PySimpleGUI/PySimpleGUI.py:9903: in __init__
    self.Finalize()
/opt/hostedtoolcache/Python/3.7.17/x64/lib/python3.7/site-packages/PySimpleGUI/PySimpleGUI.py:10609: in finalize
    self.Read(timeout=1)
/opt/hostedtoolcache/Python/3.7.17/x64/lib/python3.7/site-packages/PySimpleGUI/PySimpleGUI.py:10374: in read
    results = self._read(timeout=timeout, timeout_key=timeout_key)
/opt/hostedtoolcache/Python/3.7.17/x64/lib/python3.7/site-packages/PySimpleGUI/PySimpleGUI.py:10452: in _read
    self._Show()
/opt/hostedtoolcache/Python/3.7.17/x64/lib/python3.7/site-packages/PySimpleGUI/PySimpleGUI.py:10185: in _Show
    StartupTK(self)
/opt/hostedtoolcache/Python/3.7.17/x64/lib/python3.7/site-packages/PySimpleGUI/PySimpleGUI.py:17394: in StartupTK
    _get_hidden_master_root()
/opt/hostedtoolcache/Python/3.7.17/x64/lib/python3.7/site-packages/PySimpleGUI/PySimpleGUI.py:17334: in _get_hidden_master_root
    Window.hidden_master_root = tk.Tk()
/opt/hostedtoolcache/Python/3.7.17/x64/lib/python3.7/tkinter/__init__.py:2023: in __init__
    self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
E   _tkinter.TclError: no display name and no $DISPLAY environment variable
-- generated xml file: /home/runner/work/sigmf-python/sigmf-python/pytest.xml --
=========================== short test summary info ============================
ERROR sigmf/apps/gui.py - _tkinter.TclError: no display name and no $DISPLAY environment variable
!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!
=============================== 1 error in 3.55s ===============================

Feel free to close if this is unhelpful; I did search for similar errors but didn't find anything. For now I'm pinning to <5.0.0.

Code To Duplicate

None

Screenshot, Sketch, or Drawing

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[jason990420]

Maybe you can refer issue #4703