TypeError in configdialog.py caused by external plugins not defining CONF_DEFAULTS

Description

What steps will reproduce the problem?

I saved some preferences. Appears to be the same as https://github.com/spyder-ide/spyder/issues/11302

hughest@argon [0] $ pip freeze alabaster==0.7.12 argh==0.26.2 astroid==2.3.3 asttokens==2.0.3 atomicwrites==1.3.0 attrs==19.3.0 autopep8==1.5 Babel==2.8.0 backcall==0.1.0 bleach==3.1.0 certifi==2019.11.28 cffi==1.13.2 chardet==3.0.4 cloudpickle==1.2.2 coloredlogs==10.0 cryptography==2.8 cycler==0.10.0 decorator==4.4.1 defusedxml==0.6.0 diff-match-patch==20181111 docutils==0.16 entrypoints==0.3 flake8==3.7.9 helpdev==0.6.10 humanfriendly==4.18 idna==2.8 imagesize==1.2.0 importlib-metadata==1.4.0 intervaltree==3.0.2 ipykernel==5.1.3 ipython==7.11.1 ipython-genutils==0.2.0 isort==4.3.21 jedi==0.14.1 jeepney==0.4.2 Jinja2==2.10.3 jsonschema==3.2.0 jupyter-client==5.3.4 jupyter-core==4.6.1 keyring==21.1.0 kiwisolver==1.1.0 lazy-object-proxy==1.4.3 line-profiler==3.0.2 lxml==4.4.2 Markdown==3.1.1 MarkupSafe==1.1.1 matplotlib==3.1.2 mccabe==0.6.1 memory-profiler==0.57.0 mistune==0.8.4 modelx==0.2.0 more-itertools==8.1.0 nbconvert==5.6.1 nbformat==5.0.3 networkx==2.4 notebook==6.0.3 numpy==1.18.1 numpydoc==0.9.2 packaging==20.0 pandocfilters==1.4.2 parso==0.5.2 pathtools==0.1.2 pexpect==4.8.0 pickleshare==0.7.5 pluggy==0.13.1 prometheus-client==0.7.1 prompt-toolkit==3.0.2 psutil==5.6.7 ptyprocess==0.6.0 Pweave==0.30.3 pycodestyle==2.5.0 pycparser==2.19 pydocstyle==5.0.2 pyflakes==2.1.1 Pygments==2.5.2 pylint==2.4.4 pyparsing==2.4.6 PyQt5==5.12.3 PyQt5-sip==12.7.0 PyQtWebEngine==5.12.1 pyrsistent==0.15.7 python-dateutil==2.8.1 python-jsonrpc-server==0.3.4 python-language-server==0.31.7 pytz==2019.3 pyxdg==0.26 PyYAML==5.3 pyzmq==18.1.1 QDarkStyle==2.8 QtAwesome==0.6.1 qtconsole==4.6.0 QtPy==1.9.0 requests==2.22.0 rope==0.16.0 SecretStorage==3.1.2 Send2Trash==1.5.0 six==1.14.0 snowballstemmer==2.0.0 sortedcontainers==2.1.0 Sphinx==2.3.1 sphinxcontrib-applehelp==1.0.1 sphinxcontrib-devhelp==1.0.1 sphinxcontrib-htmlhelp==1.0.2 sphinxcontrib-jsmath==1.0.1 sphinxcontrib-qthelp==1.0.2 sphinxcontrib-serializinghtml==1.1.3 spyder==4.0.1 spyder-kernels==1.8.1 spyder-line-profiler==0.2.0 spyder-memory-profiler==0.2.0 spyder-modelx==0.1.0 spyder-notebook==0.2.1 spyder-reports==0.1.1 spyder-terminal==0.2.4 spyder-unittest==0.4.0 terminado==0.8.3 testpath==0.4.4 tornado==6.0.3 traitlets==4.3.3 ujson==1.35 urllib3==1.25.8 watchdog==0.9.0 wcwidth==0.1.8 webencodings==0.5.1 wrapt==1.11.2 wurlitzer==2.0.0 yapf==0.29.0 zipp==2.0.0

Traceback

  File "/home/hughest/.pyenv/versions/3.8.1/lib/python3.8/site-packages/spyder/app/mainwindow.py", line 3139, in show_preferences
    widget = plugin._create_configwidget(dlg, self)
  File "/home/hughest/.pyenv/versions/3.8.1/lib/python3.8/site-packages/spyder/plugins/base.py", line 117, in _create_configwidget
    configwidget.initialize()
  File "/home/hughest/.pyenv/versions/3.8.1/lib/python3.8/site-packages/spyder/preferences/configdialog.py", line 72, in initialize
    self.load_from_conf()
  File "/home/hughest/.pyenv/versions/3.8.1/lib/python3.8/site-packages/spyder/preferences/configdialog.py", line 327, in load_from_conf
    checkbox.setChecked(self.get_option(option, default, section=sec))
TypeError: setChecked(self, bool): argument 1 has unexpected type 'str'
Traceback (most recent call last):
  File "/home/hughest/.pyenv/versions/3.8.1/lib/python3.8/site-packages/spyder/app/mainwindow.py", line 3139, in show_preferences
    widget = plugin._create_configwidget(dlg, self)
  File "/home/hughest/.pyenv/versions/3.8.1/lib/python3.8/site-packages/spyder/plugins/base.py", line 117, in _create_configwidget
    configwidget.initialize()
  File "/home/hughest/.pyenv/versions/3.8.1/lib/python3.8/site-packages/spyder/preferences/configdialog.py", line 72, in initialize
    self.load_from_conf()
  File "/home/hughest/.pyenv/versions/3.8.1/lib/python3.8/site-packages/spyder/preferences/configdialog.py", line 327, in load_from_conf
    checkbox.setChecked(self.get_option(option, default, section=sec))
TypeError: setChecked(self, bool): argument 1 has unexpected type 'str'

Versions

• Spyder version: 4.0.1
• Python version: 3.8.1
• Qt version: 5.12.6
• PyQt5 version: 5.12.3
• Operating System: Linux 5.3.16-300.fc31.x86_64

Dependencies

atomicwrites >=1.2.0         :  1.3.0 (OK)
chardet >=2.0.0              :  3.0.4 (OK)
cloudpickle >=0.5.0          :  1.2.2 (OK)
diff_match_patch >=20181111  :  20181111 (OK)
intervaltree                 :  None (OK)
IPython >=4.0                :  7.11.1 (OK)
jedi =0.14.1                 :  0.14.1 (OK)
keyring                      :  None (OK)
nbconvert >=4.0              :  5.6.1 (OK)
numpydoc >=0.6.0             :  0.9.2 (OK)
pexpect >=4.4.0              :  4.8.0 (OK)
pickleshare >=0.4            :  0.7.5 (OK)
psutil >=0.3                 :  5.6.7 (OK)
pygments >=2.0               :  2.5.2 (OK)
pylint >=0.25                :  2.4.4 (OK)
pyls >=0.31.2;<0.32.0        :  0.31.7 (OK)
xdg >=0.26                   :  0.26 (OK)
zmq >=17                     :  18.1.1 (OK)
qdarkstyle >=2.7             :  2.8 (OK)
qtawesome >=0.5.7            :  0.6.1 (OK)
qtconsole >=4.6.0            :  4.6.0 (OK)
qtpy >=1.5.0                 :  1.9.0 (OK)
sphinx >=0.6.6               :  2.3.1 (OK)
spyder_kernels >=1.8.1;<2.0.0:  1.8.1 (OK)
watchdog                     :  None (OK)
cython >=0.21                :  None (NOK)
matplotlib >=2.0.0           :  3.1.2 (OK)
numpy >=1.7                  :  1.18.1 (OK)
pandas >=0.13.1              :  None (NOK)
scipy >=0.17.0               :  None (NOK)
sympy >=0.7.3                :  None (NOK)

[timhughes]

yeah i have the following. I can see if i can isolate which one

spyder==4.0.1
spyder-kernels==1.8.1
spyder-line-profiler==0.2.0
spyder-memory-profiler==0.2.0
spyder-modelx==0.1.0
spyder-notebook==0.2.1
spyder-reports==0.1.1
spyder-terminal==0.2.4
spyder-unittest==0.4.0

[timhughes]

cheers , thanks