3.10.8 IDLE startup failure: No module named 'test'

[cursorhigh]

Bug report

I tried everything possible trying it in different pc , using VMware , used it in 10, and 11 , too and still boom idle is not opening , earlier I thought the problem is in my pc but t tried everything and hence its this program problem and also I tried 3.11 and 3.9 , it works perfectly fine

Your environment

i tried it in almost every env with different pc , and hence problem might be in the software i.e. python idle

EDIT by Terry J. Reedy: This is an IDLE regression in 3.10.8. My fault. See #98324 (comment) below for the fixes.

[stevendaprano]

python idle not working/opening

Please describe what you did and what happened. Please be precise, it's not enough to say you tried "everything" and "still boom idle is not opening".

What did you do? Double-click a file, type a command at the command prompt, use the Windows start menu, something else? Give us the exact steps please.

What happened then? Did you get an error? Can you copy and paste the error, or if not possible, take a screenshot?

What is your environment? Trust me, you did not try "almost every env". What version of Windows are you running? Did you try temporarily disabling any anti-virus? How many versions of Python do you have? Did you install 3.9 and 3.11 from the Windows app store too?

@zooba @terryjreedy

[cursorhigh]

python idle not working/opening

Please describe what you did and what happened. Please be precise, it's not enough to say you tried "everything" and "still boom idle is not opening".

What did you do? Double-click a file, type a command at the command prompt, use the Windows start menu, something else? Give us the exact steps please.

What happened then? Did you get an error? Can you copy and paste the error, or if not possible, take a screenshot?

What is your environment? Trust me, you did not try "almost every env". What version of Windows are you running? Did you try temporarily disabling any anti-virus? How many versions of Python do you have? Did you install 3.9 and 3.11 from the Windows app store too?

@zooba @terryjreedy

here is a video
https://user-images.githubusercontent.com/115407035/196025457-185b0e40-cf15-4eed-b88f-346f83bb8d32.mp4
and trying everything means - resetting my pc and trying it or using a VMware(aka virtual env) or trying it on another pc
What is your environment? Trust me, you did not try "almost every env"
ans- obviously not every only that which have windows store in it
What version of Windows are you running?
ans- windows 10
Did you try temporarily disabling any anti-virus?
ans- yep , also tried without antivirus(by uninstalling antivirus)
How many versions of Python do you have?
ans- i have used a single version at a time
Did you install 3.9 and 3.11 from the Windows app store too?
ans - yup (also tried 3.8 and 3.7 too)

[50csent]

Confirming this issue. Today noticed exactly the same problem: can't start IDLE anymore from the Start menu, no error, no anything. In the Start menu I click on "IDLE (Python 3.10)" entry and nothing happens. Can't say when was the last time I ran IDLE, maybe a week or couple ago, noticed this problem only today when tried to launch it.

OS - Windows 10 Pro 21H2 (OS Build 19044.2130)
Python - 3.10.8 from Microsoft Store (the only Python installation on the system). In the Library tab of Microsoft Store, it displays that the entry "Python 3.10 (Python Software Foundation)" was modified on 2022-10-14.

Python 3.10.8 was released on 2022-10-11 according to the announcement. I don't know when it arrived to Microsoft Store, maybe couple days later. So maybe this bug/issue was introduced in 3.10.8 version.

Console version of Python from Command Prompt runs fine:

C:\Users\Administrator>python
Python 3.10.8 (tags/v3.10.8:aaaf517, Oct 11 2022, 16:50:30) [MSC v.1933 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> print("hello world")
hello world
>>>

Executing python -m idlelib from Command Prompt prints this:

C:\Users\Administrator>python -m idlelib
Traceback (most recent call last):
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.2288.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.2288.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.2288.0_x64__qbz5n2kfra8p0\lib\idlelib\__main__.py", line 6, in <module>
    import idlelib.pyshell
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.2288.0_x64__qbz5n2kfra8p0\lib\idlelib\pyshell.py", line 53, in <module>
    from idlelib import debugger
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.2288.0_x64__qbz5n2kfra8p0\lib\idlelib\debugger.py", line 7, in <module>
    from idlelib import macosx
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.2288.0_x64__qbz5n2kfra8p0\lib\idlelib\macosx.py", line 7, in <module>
    from test.support import requires, ResourceDenied
ModuleNotFoundError: No module named 'test'

Also similar output when running python -m idlelib.idle from Command Prompt:

C:\Users\Administrator>python -m idlelib.idle
Traceback (most recent call last):
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.2288.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.2288.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.2288.0_x64__qbz5n2kfra8p0\lib\idlelib\idle.py", line 13, in <module>
    from idlelib.pyshell import main  # This is subject to change
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.2288.0_x64__qbz5n2kfra8p0\lib\idlelib\pyshell.py", line 53, in <module>
    from idlelib import debugger
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.2288.0_x64__qbz5n2kfra8p0\lib\idlelib\debugger.py", line 7, in <module>
    from idlelib import macosx
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.2288.0_x64__qbz5n2kfra8p0\lib\idlelib\macosx.py", line 7, in <module>
    from test.support import requires, ResourceDenied
ModuleNotFoundError: No module named 'test'

[terryjreedy]

This issue is fixed for future releases by #98313. The problem is that #97530 fixed IDLE tests possibly crashing on a Mac without a GUI. But it resulted in IDLE not starting in 3.10.8, 3.12.0a1, and Microsoft Python 3.10.2288.0 when tests are not installed. After this patch, test.* is only imported when testing on Mac, which test.* must exist.

Fix 1: edit Lib/idlelib/macosx.py by making line 7 a comment and replacing line 23 with pass so that lines 4-25 become

from os.path import expanduser
import plistlib
from sys import platform  # Used in _init_tk_type, changed by test.
# from test.support import requires, ResourceDenied  # <- line 7 now a comment

import tkinter


## Define functions that query the Mac graphics type.
## _tk_type and its initializer are private to this section.

_tk_type = None

def _init_tk_type():
    """ Initialize _tk_type for isXyzTk functions.
    """
    global _tk_type
    if platform == 'darwin':
        try:
            pass  # <- line 23 replacement
        except ResourceDenied:  # Possible when testing.
            _tk_type = "cocoa"  # Newest and most common.

Alternatively, delete line 7 and the 4-line try-except block lines 22-25. Note that the path may be slightly different before idlelib on non-Windows systems and that admin privileges may be required, depending on how Python was installed.

Edit: 3.11.0, without the bug, was released today.
AFAIK, Windows Store Python omits the test package by default and perhaps always. This installer is produced by Microsoft, not by the Python Software Foundation (PSF) core developers. I do not know how often Microsoft updates it. I also do not know its install options and locations - Program Files or Users\user\AppData\???. I will edit this note if someone supplies more details
@zooba Can you?

The PSF python.org Windows installer installs test/* by default. An alternate fix for someone who changed the default is to re-run the installer, select Modify, reselect 'Install tests', and click the install/continue/whatever button.

AFAIK, the PSF python.org Mac installer always installs test/*.

I don't know what *nix distributions do, but there should be an option to install tests if not the default.

[zooba]

AFAIK, Windows Store Python omits the test package by default and perhaps always. This installer is produced by Microsoft, not by the Python Software Foundation (PSF) core developers. I do not know how often Microsoft updates it. I also do not know its install options and locations - Program Files or Users\user\AppData???. I will edit this note if someone supplies more details
@zooba Can you?

This is our package, and I update it as part of doing the regular releases. So it'll get any updates at the same time (plus review by Microsoft Store team, which is typically only a day or two).

There's no option to include the test suite, and I don't really want to double the install size by adding it in. We shouldn't have dependencies on the test suite from the main stdlib code.

[terryjreedy]

Thanks; I edited the Store part of my answer above.

Continue omitting the test suite. The revised code only imports test on Mac and only when test.test_idle is run, when the import must succeed.