pyuic5 - ModuleNotFoundError: No module named PyQt5.sip

Question

I have just installed Anaconda 5.2 with Python 3.6 on my windows system. Also installed pyqt5 and pyqt5-tools via pip with administrator privilege. Now when I run pyuic5.exe for converting ui files it shows following error:

Traceback (most recent call last):
  File "C:\Users\AshfaqurRahman\Anaconda3\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
  File "C:\Users\AshfaqurRahman\Anaconda3\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
  File "C:\Users\AshfaqurRahman\AppData\Roaming\Python\Python36\site-packages\PyQt5\uic\pyuic.py", line 26, in <module>
from PyQt5 import QtCore
ModuleNotFoundError: No module named 'PyQt5.sip'

I have tried installing PyQt5-sip package using pip. Buts its already installed in my system.

Why this problem is occurring? How can I solve this problem?

Answer 1

According to Agile_Eagle's suggestion from the comments I just uninstalled pyqt5 and pyqt5-tools packages and the reinstalled them. Problem solved!

PS.: If you still got problems with PyQt, try uninstalling all of the PyQt related libraries:

pip uninstall PyQt5
pip uninstall PyQt5-sip
pip uninstall PyQtWebEngine

Then install them again, this will fix:

ModuleNotFoundError: No module named 'PyQt5.sip'
ModuleNotFoundError: No module named 'PyQt5.QtWebEngineWidgets'

PPS.:If you got problems uninstalling the libraries, go to your Python folder, like C:\Users\<USERNAME>\AppData\Local\Programs\Python\Python<PYTHON-VERSION>\Lib\site-packages and manually delete the PyQt folders, then uninstall everything and install again (Make sure you have the latest Python version and upgraded your pip too)

Answer 2

As of June 2019, pyqt5-tools no longer exists. The solution I found was first installing pyqt5-sip and then install pyqt5

$ pip install pyqt5-sip

$ pip install pyqt5

This seems to get rid of the following error: ModuleNotFoundError: No module named 'PyQt5.sip'