PyQt5 symbols are not recognized #1853

Environment data

• VS Code version: 1.41.1
• Extension version (available under the Extensions sidebar): 2019.11.50794
• OS and version: Windows_NT x64 10.0.18363
• Python version (& distribution if applicable, e.g. Anaconda): Python 3.8.1
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): virtualenv
• Relevant/affected Python packages and their versions: PyQt5
• Jedi or Language Server? (i.e. what is "python.jediEnabled" set to; more info How to update the language server to the latest stable version vscode-python#3977): "python.jediEnabled": false

Expected behavior

with the settings.json file configured as
"python.autoComplete.extraPaths": [
"C:/Users/Administrator/.virtualenvs/PyQt5-w5h0JEeT/Lib/site-packages",
"C:/Users/Administrator/.virtualenvs/PyQt5-w5h0JEeT/Lib"
],
I expect the code navigation function works, but it does not.

Actual behaviour

for this line:
from PyQt5.Qt import *
it shows 'from PyQt5.Qt import *' used; unable to detect undefined namesflake8(F403)
and if I right click on QApplication symbol and then I select "Go to Definition", it shows "No definition found for QApplication "

meanwhile it works for
import sys
print(sys.argv)
"Go to Definition" for sys.argv get me to correct location in sys.pyi