Spyder: Spyder doesn't start - no module named 'PyQt5.QtWebEngineWidgets'

Created on 15 Mar 2019 · 13Comments · Source: spyder-ide/spyder

Problem Description

I recently installed Python and Spyder in my computer, but Spyder doesn't start.

What steps reproduce the problem?

Download and Install Python 3.7.2
Open cmd
pip install spyder
python
import spyder; spyder.app.start.main()

What is the expected output? What do you see instead?

Expected opening the GUI, but error occurred.

Paste Traceback/Error Below (if applicable)

Traceback (most recent call last):
  File "C:\Python37\lib\site-packages\qtpy\QtWebEngineWidgets.py", line 22, in <module>
    from PyQt5.QtWebEngineWidgets import QWebEnginePage
ModuleNotFoundError: No module named 'PyQt5.QtWebEngineWidgets'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python37\lib\site-packages\spyder\app\start.py", line 178, in main
    from spyder.app import mainwindow
  File "C:\Python37\lib\site-packages\spyder\app\mainwindow.py", line 90, in <module>
    from qtpy import QtWebEngineWidgets  # analysis:ignore
  File "C:\Python37\lib\site-packages\qtpy\QtWebEngineWidgets.py", line 26, in <module>
    from PyQt5.QtWebKitWidgets import QWebPage as QWebEnginePage
ModuleNotFoundError: No module named 'PyQt5.QtWebKitWidgets'

Versions

Spyder version: 3.3.3
Python version: 3.7.2 64-bit
Qt version: 5.10.0
PyQt version: 5.12
Operating System name/version: Windows 10

Dependencies

IPython >=4.0     :  7.2.0 (OK)
cython >=0.21     :  0.29.6 (OK)
jedi >=0.9.0      :  0.13.2 (OK)
matplotlib >=2.0.0:  3.0.2 (OK)
nbconvert >=4.0   :  5.4.0 (OK)
numpy >=1.7       :  1.15.4 (OK)
pandas >=0.13.1   :  0.24.1 (OK)
pycodestyle >=2.3 :  2.5.0 (OK)
pyflakes >=0.6.0  :  2.1.0 (OK)
pygments >=2.0    :  2.3.1 (OK)
pylint >=0.25     :  2.2.2 (OK)
qtconsole >=4.2.0 :  4.4.3 (OK)
rope >=0.9.4      :  0.11.0 (OK)
sphinx >=0.6.6    :  1.8.3 (OK)
sympy >=0.7.3     :  1.3 (OK)

Solution

I managed to fix it, by installing an older version of PyQt5, following this discussion on Stack Overflow: https://stackoverflow.com/questions/51154871/python-3-7-0-no-module-named-pyqt5-qtwebenginewidgets

pip install PyQt5==5.10

Source

reisarthur

👍7

Most helpful comment

Actually you need to uninstall it first:
pip uninstall pyqtwebengine
pip install pyqtwebengine

This solved it for me.

BartBruininks on 6 Jun 2019

❤18

All 13 comments

Thanks for reporting. This is a duplicate of issue #8747 and it'll be fixed in our next version (3.3.4).

For now you can run

pip install pyqtwebengine

to get the fix.

ccordoba12 on 15 Mar 2019

👍10

Actually you need to uninstall it first:
pip uninstall pyqtwebengine
pip install pyqtwebengine

This solved it for me.

BartBruininks on 6 Jun 2019

❤18

I tried both approaches above:

Actually you need to uninstall it first: pip uninstall pyqtwebengine pip install pyqtwebengine

But I still get the same errors. This happens with ALL of my environments, base and 2 other different virtual environments I have tried. It seems to be a bad system-wide reference.

```(quantecon) c:\ProgramData\Anaconda3\envs\quantecon\Scripts>spyder
Traceback (most recent call last):
File "c:\ProgramData\Anaconda3\envs\quantecon\lib\site-packages\qtpy\QtWebEngineWidgets.py", line 22, in
from PyQt5.QtWebEngineWidgets import QWebEnginePage
ModuleNotFoundError: No module named 'PyQt5.QtWebEngineWidgets'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "c:\ProgramData\Anaconda3\envs\quantecon\Scripts\spyder-script.py", line 10, in
sys.exit(main())
File "c:\ProgramData\Anaconda3\envs\quantecon\lib\site-packages\spyder\app\start.py", line 192, in main
from spyder.app import mainwindow
File "c:\ProgramData\Anaconda3\envs\quantecon\lib\site-packages\spyder\app\mainwindow.py", line 82, in
from qtpy import QtWebEngineWidgets # analysis:ignore
File "c:\ProgramData\Anaconda3\envs\quantecon\lib\site-packages\qtpy\QtWebEngineWidgets.py", line 26, in
from PyQt5.QtWebKitWidgets import QWebPage as QWebEnginePage
ModuleNotFoundError: No module named 'PyQt5.QtWebKitWidgets'```

I need HELP with this one !! I don't want to reinstall Anaconda and re-build 6 or 7 different environments; that is too time consuming !!!

I am running the following environment right now:

(quantecon) c:\ProgramData\Anaconda3\envs\quantecon\Scripts>conda list

packages in environment at C:\ProgramData\Anaconda3\envs\quantecon:

richdevboston on 16 Sep 2019

I tried both approaches above

By using pip to install PyQt5 you basically broke your Anaconda installation, so now you have to reinstall it.

And please stick to the defaults packages (instead of using conda-forge) to see if that helps.

ccordoba12 on 16 Sep 2019

pip3 install PyQtWebEngine

SystemsPatrick on 28 Jan 2020

I tried both approaches above

By using pip to install PyQt5 you basically broke your Anaconda installation, so now you have to reinstall it.

And please stick to the defaults packages (instead of using conda-forge) to see if that helps.

I just download the python 3.8 and pip install pyqt5 and PyQtWebEngine still get this issue how to solve it?

woshichuanqilz on 15 Feb 2020

Is the issue related to this: https://stackoverflow.com/questions/37876987/cannot-import-qtwebkitwidgets-in-pyqt5 which would mean the version of pyqt5 getting installed is too new?

It seems like everytime I try to use spyder from a conda environment I get this error and I have to recreate the environment and install a specific version for spyder to work.

odinsbane on 20 Feb 2020

Problem Description

I recently installed Python and Spyder in my computer, but Spyder doesn't start.

What steps reproduce the problem?

1. Download and Install Python 3.7.2

2. Open cmd

3. `pip install spyder`

4. `python`

5. `import spyder; spyder.app.start.main()`

What is the expected output? What do you see instead?

Expected opening the GUI, but error occurred.

Paste Traceback/Error Below (if applicable)

Traceback (most recent call last):
  File "C:\Python37\lib\site-packages\qtpy\QtWebEngineWidgets.py", line 22, in <module>
    from PyQt5.QtWebEngineWidgets import QWebEnginePage
ModuleNotFoundError: No module named 'PyQt5.QtWebEngineWidgets'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python37\lib\site-packages\spyder\app\start.py", line 178, in main
    from spyder.app import mainwindow
  File "C:\Python37\lib\site-packages\spyder\app\mainwindow.py", line 90, in <module>
    from qtpy import QtWebEngineWidgets  # analysis:ignore
  File "C:\Python37\lib\site-packages\qtpy\QtWebEngineWidgets.py", line 26, in <module>
    from PyQt5.QtWebKitWidgets import QWebPage as QWebEnginePage
ModuleNotFoundError: No module named 'PyQt5.QtWebKitWidgets'

Versions

* Spyder version: 3.3.3

* Python version: 3.7.2 64-bit

* Qt version: 5.10.0

* PyQt version: 5.12

* Operating System name/version: Windows 10

Dependencies

IPython >=4.0     :  7.2.0 (OK)
cython >=0.21     :  0.29.6 (OK)
jedi >=0.9.0      :  0.13.2 (OK)
matplotlib >=2.0.0:  3.0.2 (OK)
nbconvert >=4.0   :  5.4.0 (OK)
numpy >=1.7       :  1.15.4 (OK)
pandas >=0.13.1   :  0.24.1 (OK)
pycodestyle >=2.3 :  2.5.0 (OK)
pyflakes >=0.6.0  :  2.1.0 (OK)
pygments >=2.0    :  2.3.1 (OK)
pylint >=0.25     :  2.2.2 (OK)
qtconsole >=4.2.0 :  4.4.3 (OK)
rope >=0.9.4      :  0.11.0 (OK)
sphinx >=0.6.6    :  1.8.3 (OK)
sympy >=0.7.3     :  1.3 (OK)

Solution

pip install PyQt5==5.10

This worked for me. Ubuntu 19.10 x86_64

DurgaPrasadMyWay on 28 Mar 2020

👍1

I got past the first couple of potholes by installing as follows in my Anaconda 2020.02 base environment with Spyder v4.0.1 and Python 3.7.6:

pip install PyQt5==5.12.1 pyqtwebengine==5.12.1

I used 5.12.1 because of requisites for PyQt5<5.13 and pqtwebengine<5.13 reported on my attempt to install the latest version. This brought me to the following error message:

(base) Singularity> spyder
Traceback (most recent call last):
File "/usr/local/anaconda3/lib/python3.7/site-packages/qtpy/__init__.py", line 204, in
from PySide import __version__ as PYSIDE_VERSION # analysis:ignore
ModuleNotFoundError: No module named 'PySide'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/local/anaconda3/bin/spyder", line 11, in
sys.exit(main())
File "/usr/local/anaconda3/lib/python3.7/site-packages/spyder/app/start.py", line 201, in main
from spyder.app import mainwindow
File "/usr/local/anaconda3/lib/python3.7/site-packages/spyder/app/mainwindow.py", line 52, in
requirements.check_qt()
File "/usr/local/anaconda3/lib/python3.7/site-packages/spyder/requirements.py", line 41, in check_qt
import qtpy
File "/usr/local/anaconda3/lib/python3.7/site-packages/qtpy/__init__.py", line 210, in
raise PythonQtError('No Qt bindings could be found')
qtpy.PythonQtError: No Qt bindings could be found

At line 210, we have the following code:

if API in PYSIDE_API:
    try:
        from PySide import __version__ as PYSIDE_VERSION  # analysis:ignore
        from PySide.QtCore import __version__ as QT_VERSION  # analysis:ignore
        PYQT_VERSION = None
        PYQT5 = PYSIDE2 = False
        PYSIDE = True
    except ImportError:
        raise PythonQtError('No Qt bindings could be found')

The PySide 1.2.4 module is not compatible with Python version 3.7 (only up to 3.4), and installing PySide2 5.12.1 module does not resolve the binding issue, presumably because it would have to import PySide2, not PySide.

mvpel on 6 Apr 2020

👍2

@ccordoba12

I tried both approaches above

By using pip to install PyQt5 you basically broke your Anaconda installation, so now you have to reinstall it.

And please stick to the defaults packages (instead of using conda-forge) to see if that helps.

Thus, what is the installation to follow with conda?
Only pip installation is provided, yet I cannot seem to find a conda install for PyQTWebEngine.
Please advise.Thank you!

gussmith on 21 Jul 2020

First uninstall both PyQt5 and pyqtwebengine
pip uninstall PyQt5
pip uninstall pyqtwebengine
then install both
pip install PyQt5==5.12.1 pyqtwebengine==5.12.1

JyotirmaySahu on 6 Aug 2020

@ccordoba12

I tried both approaches above

By using pip to install PyQt5 you basically broke your Anaconda installation, so now you have to reinstall it.
And please stick to the defaults packages (instead of using conda-forge) to see if that helps.

Thus, what is the installation to follow with conda?
Only pip installation is provided, yet I cannot seem to find a conda install for PyQTWebEngine.
Please advise.Thank you!

First uninstall both PyQt5 and pyqtwebengine
pip uninstall PyQt5
pip uninstall pyqtwebengine
then install both
pip install PyQt5==5.12.1 pyqtwebengine==5.12.1

JyotirmaySahu on 6 Aug 2020

I have the same issue but can only install pyqtwebengine > 5.13

digrks on 27 Aug 2020

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Spyder: Spyder doesn't start - no module named 'PyQt5.QtWebEngineWidgets'

Problem Description

What steps reproduce the problem?

What is the expected output? What do you see instead?

Paste Traceback/Error Below (if applicable)

Versions

Dependencies

Solution

Most helpful comment

All 13 comments

packages in environment at C:\ProgramData\Anaconda3\envs\quantecon:

Name Version Build Channel

Problem Description

What steps reproduce the problem?

What is the expected output? What do you see instead?

Paste Traceback/Error Below (if applicable)

Versions

Dependencies

Solution

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