PyQt5 Installation

[snippsat]

venv\Scripts\python.exe

You are now running from virtual environment venv.
This mean that PyQt5 most be installed first in this environment.
Configure a Python interpreter here can you point Interpreter to OS version of Python,that i guess you have installed PyQt5 to.

Quick demo of venv.

# Make 
E:\div_code
λ python -m venv pyqt5_env

# Cd in
E:\div_code
λ cd pyqt5_env\

# Activate
E:\div_code\pyqt5_env
λ E:\div_code\pyqt5_env\Scripts\activate

# Install
(pyqt5_env) E:\div_code\pyqt5_env
λ pip install PyQt5
Collecting PyQt5
  Downloading ....
Successfully installed PyQt5-5.14.1 PyQt5-sip-12.7.1

# Test that it wok
(pyqt5_env) E:\div_code\pyqt5_env
λ python
Python 3.7.3 (v3.7.3:ef4ec6ed12, Mar 25 2019, 21:26:53) [MSC v.1916 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from PyQt5.QtWidgets import QApplication, QWidget
>>>
>>> exit()

So if i was using PyCharm(which i am not) could point interpreter to E:\div_code\pyqt5_env\Scripts\python.exe
Then it will work PyCharm for this environment,and eg not for OS python if not also have installed PyQt5 there.