Code completions/suggestions do not have a background box (poor visibility)

[mmagnuski]

Problem descriptions

The code completions do not have any background and thus are often difficult to read:

What steps will reproduce the problem?

To reproduce the situation presented in the screenshot:

1. open a jupyter notebook

2. import numpy as np

3. create a cell and leave it blank, create and go to the third cell

4. generate some text, for example:

   from string import ascii_letters
   
   for idx in range(10):
       print(''.join(ascii_letters))

5. go back to the second cell, type np.r and press tab

Versions and main components

• Spyder Version: 4.1.5
• Python Version: 3.7.3
• Qt Version: 5.9.7
• PyQt Version: 5.9.2 (pyqt5-sip=12.8.0)
• Operating system: Windows

jupyter:

# Name                    Version                   Build  Channel
jupyter                   1.0.0                    py37_7
jupyter_client            6.1.6                      py_0
jupyter_console           6.2.0                      py_0
jupyter_core              4.6.3                    py37_0
jupyterlab                2.2.6                      py_0
jupyterlab_pygments       0.1.1                      py_0
jupyterlab_server         1.2.0                      py_0
notebook                  6.1.1                    py37_0
spyder-notebook           0.3.0                      py_0    spyder-ide

Dependencies

# Mandatory:
atomicwrites >=1.2.0           :  1.4.0 (OK)
chardet >=2.0.0                :  3.0.4 (OK)
cloudpickle >=0.5.0            :  1.6.0 (OK)
diff_match_patch >=20181111    :  20200713 (OK)
intervaltree                   :  None (OK)
IPython >=4.0                  :  7.13.0 (OK)
jedi =0.17.1                   :  0.17.1 (OK)
nbconvert >=4.0                :  6.0.6 (OK)
numpydoc >=0.6.0               :  0.9.1 (OK)
paramiko >=2.4.0               :  2.7.2 (OK)
parso =0.7.0                   :  0.7.0 (OK)
pexpect >=4.4.0                :  4.8.0 (OK)
pickleshare >=0.4              :  0.7.5 (OK)
psutil >=5.3                   :  5.6.3 (OK)
pygments >=2.0                 :  2.7.1 (OK)
pylint >=1.0                   :  2.6.0 (OK)
pyls >=0.34.0;<1.0.0           :  0.35.1 (OK)
qdarkstyle >=2.8               :  2.8.1 (OK)
qtawesome >=0.5.7              :  0.7.2 (OK)
qtconsole >=4.6.0              :  4.7.7 (OK)
qtpy >=1.5.0                   :  1.9.0 (OK)
rtree >=0.8.3                  :  0.9.4 (OK)
sphinx >=0.6.6                 :  3.2.1 (OK)
spyder_kernels >=1.9.4;<1.10.0 :  1.9.4 (OK)
watchdog                       :  None (OK)
zmq >=17                       :  19.0.2 (OK)

# Optional:
cython >=0.21                  :  0.29.12 (OK)
matplotlib >=2.0.0             :  3.1.0 (OK)
numpy >=1.7                    :  1.18.1 (OK)
pandas >=0.13.1                :  0.25.3 (OK)
scipy >=0.17.0                 :  1.4.1 (OK)
sympy >=0.7.3                  :  None (OK)

# Spyder plugins:
spyder_notebook                :  0.3.0 (OK)

[mmagnuski]

also: the selected suggestion is not highlighted in any way so it is difficult to track which one will be selected after pressing down/up multiple times.

[jitseniesen]

Yes, I can reproduce this, also in dark mode. It looks like some of the styling for code completions is not set, which should be straightforward to fix.