没有名为 PyQt5.sip 的模块

Question

After upgrading to python-pyqt5 5.12-2 I get this error when I try to import from QtWidgets

from PyQt5.QtWidgets import * 

Error:

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'PyQt5.sip'

Any idea on how can I solve this issue?

Answer 1

The reason is a backward incompatible change in PyQt-5.11

In geoptics this fix works on old and new versions:

try:
    # new location for sip
    # https://www.riverbankcomputing.com/static/Docs/PyQt5/incompatibilities.html#pyqt-v5-11
    from PyQt5 import sip
except ImportError:
    import sip

Answer 2

As suggested here pyuic5 - ModuleNotFoundError: No module named PyQt5.sip

Try uninstalling and re-installing all 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, them uninstall everything and install again (Make sure you have the latest Python version and upgraded your pip too)

Answer 3

If you're building sip and PyQt5 from source using make files, make sure to check PyQt5 install docs . In particular,

Note

When building PyQt5 v5.11 or later you must configure SIP to create a private copy of the sip module using a command line similar to the following:

python configure.py --sip-module PyQt5.sip

If you already have SIP installed and you just want to build and install the private copy of the module then add the --no-tools option.

Answer 4

You should add PyQt5.sip to hidden imports; that should solve the issue.

Answer 5

I repaired this problem

This problem occurred when upgrading pyqt5 version 5.15.0

There was no problem when I reverted to the previous version.

I have python -V: 3.7.4

PYQT5 5.14.1 and PYSIDE 5.14.1 works fine

Answer 6

In addition to the answer provided by Tadeu ( https://stackoverflow.com/a/58880976/12455023 ) I would also suggest checking version of your libraries to make sure that they match.

Use pip show <library_name>

This will help you to make sure that no earlier installation is conflicting with your current installation.

In place of library_name use PyQt5 , PyQt5-sip , PyQtWebEngine . If any of them is present in the system, then use pip uninstall <library_name>==<version_number> to remove that library.

Once you made sure that no other versions of these libraries are there, then you can reinstall the preferred version of that library.