AttributeError when calling switch_to_plugin

[DharmJarwani]

Description

What steps will reproduce the problem?

When i tried to add title 12.7.py it show this dialog box 'issue reporter'

Traceback

Traceback (most recent call last):
  File "C:\Users\ACER\AppData\Local\spyder-6\envs\spyder-runtime\Lib\site-packages\spyder\app\mainwindow.py", line 552, in switch_to_plugin
    self.layouts.switch_to_plugin(plugin, force_focus=force_focus)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'switch_to_plugin'
Traceback (most recent call last):
  File "C:\Users\ACER\AppData\Local\spyder-6\envs\spyder-runtime\Lib\site-packages\spyder\app\mainwindow.py", line 552, in switch_to_plugin
    self.layouts.switch_to_plugin(plugin, force_focus=force_focus)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'switch_to_plugin'
Traceback (most recent call last):
  File "C:\Users\ACER\AppData\Local\spyder-6\envs\spyder-runtime\Lib\site-packages\spyder\app\mainwindow.py", line 552, in switch_to_plugin
    self.layouts.switch_to_plugin(plugin, force_focus=force_focus)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'switch_to_plugin'
Traceback (most recent call last):
  File "C:\Users\ACER\AppData\Local\spyder-6\envs\spyder-runtime\Lib\site-packages\spyder\app\mainwindow.py", line 552, in switch_to_plugin
    self.layouts.switch_to_plugin(plugin, force_focus=force_focus)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'switch_to_plugin'
Traceback (most recent call last):
  File "C:\Users\ACER\AppData\Local\spyder-6\envs\spyder-runtime\Lib\site-packages\spyder\app\mainwindow.py", line 552, in switch_to_plugin
    self.layouts.switch_to_plugin(plugin, force_focus=force_focus)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'switch_to_plugin'
Traceback (most recent call last):
  File "C:\Users\ACER\AppData\Local\spyder-6\envs\spyder-runtime\Lib\site-packages\spyder\app\mainwindow.py", line 552, in switch_to_plugin
    self.layouts.switch_to_plugin(plugin, force_focus=force_focus)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'switch_to_plugin'

Versions

• Spyder version: 6.0.1 (standalone)
• Python version: 3.11.9 64-bit
• Qt version: 5.15.8
• PyQt5 version: 5.15.9
• Operating System: Windows-10-10.0.19045-SP0

Dependencies

# Mandatory:
aiohttp >=3.9.3                  :  3.10.5 (OK)
asyncssh >=2.14.0,<3.0.0         :  2.17.0 (OK)
atomicwrites >=1.2.0             :  1.4.1 (OK)
chardet >=2.0.0                  :  5.2.0 (OK)
cloudpickle >=0.5.0              :  3.0.0 (OK)
cookiecutter >=1.6.0             :  2.6.0 (OK)
diff_match_patch >=20181111      :  20230430 (OK)
github >=2.3.0                   :  2.4.0 (OK)
importlib_metadata >=4.6.0       :  8.5.0 (OK)
intervaltree >=3.0.2             :  3.1.0 (OK)
IPython >=8.13.0,<9.0.0,!=8.17.1 :  8.27.0 (OK)
jedi >=0.17.2,<0.20.0            :  0.19.1 (OK)
jellyfish >=0.7                  :  1.1.0 (OK)
jsonschema >=3.2.0               :  4.23.0 (OK)
keyring >=17.0.0                 :  25.4.1 (OK)
nbconvert >=4.0                  :  7.16.4 (OK)
numpydoc >=0.6.0                 :  1.8.0 (OK)
parso >=0.7.0,<0.9.0             :  0.8.4 (OK)
pexpect >=4.4.0                  :  4.9.0 (OK)
pickleshare >=0.4                :  0.7.5 (OK)
psutil >=5.3                     :  6.0.0 (OK)
pygments >=2.0                   :  2.18.0 (OK)
pylint >=3.1,<4                  :  3.3.0 (OK)
pylint_venv >=3.0.2              :  3.0.3 (OK)
pyls_spyder >=0.4.0              :  0.4.0 (OK)
pylsp >=1.12.0,<1.13.0           :  1.12.0 (OK)
pylsp_black >=2.0.0,<3.0.0       :  2.0.0 (OK)
pyuca >=1.2                      :  1.2 (OK)
qdarkstyle >=3.2.0,<3.3.0        :  3.2.3 (OK)
qstylizer >=0.2.2                :  0.2.3 (OK)
qtawesome >=1.3.1,<1.4.0         :  1.3.1 (OK)
qtconsole >=5.6.0,<5.7.0         :  5.6.0 (OK)
qtpy >=2.4.0                     :  2.4.1 (OK)
rtree >=0.9.7                    :  1.3.0 (OK)
setuptools >=49.6.0              :  74.1.2 (OK)
sphinx >=0.6.6                   :  8.0.2 (OK)
spyder_kernels >=3.0.0,<3.1.0    :  3.0.0 (OK)
superqt >=0.6.2,<1.0.0           :  0.6.7 (OK)
textdistance >=4.2.0             :  4.6.2 (OK)
three_merge >=0.1.1              :  0.1.1 (OK)
watchdog >=0.10.3                :  5.0.2 (OK)
yarl >=1.9.4                     :  1.9.4 (OK)
zmq >=24.0.0                     :  26.2.0 (OK)

# Optional:
cython >=0.21                    :  3.0.11 (OK)
matplotlib >=3.0.0               :  3.9.2 (OK)
numpy >=1.7                      :  2.1.1 (OK)
pandas >=1.1.1                   :  2.2.3 (OK)
scipy >=0.17.0                   :  1.14.1 (OK)
sympy >=0.7.3                    :  1.13.2 (OK)

[ccordoba12]

Hey @DharmJarwani, thanks for reporting. Could you upload a video that shows how your error is generated?

We need that to try to reproduce and fix it on our side. Thanks!

[ccordoba12]

We still don't know why this bug happens but if there's someone interested in helping us to solve it, these are the steps you need to do follow to give us the info we need:

1. Open this file in Spyder or another text editor:

   C:\Users\<your user>\AppData\Local\spyder-6\envs\spyder-runtime\Lib\site-packages\spyder\app\mainwindow.py
   

2. Go to line 788, which should appear like this:

   spyder/spyder/app/mainwindow.py

   Lines 785 to 791 in 49a9cca

   	try:
   	if attr in self._INTERNAL_PLUGINS_MAPPING.keys():
   	return self.get_plugin(
   	self._INTERNAL_PLUGINS_MAPPING[attr], error=False)
   	return self.get_plugin(attr)
   	except SpyderAPIError:
   	pass

3. Change there error=False to error=True.

4. Close Spyder (if you have it open) and start it again.

5. Do the same things you did before that generated the error.

6. Clicking on the Show details button of the window that shows up after the error appears and copy/paste its text here.