由于通过pip更新了PyQt5，因此无法再启动Spyder [英] No longer able to launch Spyder since updating PyQt5 via pip

问题描述

自从在Ubuntu 18.04.2 LTS上通过python3-pip更新我的python3软件包以来，由于似乎已弃用PyQt5软件包的QtWebKitWidgets模块，所以我无法启动spyder.在终端中输入spyder3会产生以下控制台输出:

Since updating my python3 packages via python3-pip on Ubuntu 18.04.2 LTS I am unable to launch spyder as it appears that the QtWebKitWidgets module of the PyQt5 package has been deprecated. The following console output is produced upon entering spyder3 in the terminal:

Traceback (most recent call last):
  File "/home/benjamin/.local/lib/python3.6/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 "/home/benjamin/.local/bin/spyder3", line 11, in <module>
    sys.exit(main())
  File "/home/benjamin/.local/lib/python3.6/site-packages/spyder/app/start.py", line 178, in main
    from spyder.app import mainwindow
  File "/home/benjamin/.local/lib/python3.6/site-packages/spyder/app/mainwindow.py", line 90, in <module>
    from qtpy import QtWebEngineWidgets  # analysis:ignore
  File "/home/benjamin/.local/lib/python3.6/site-packages/qtpy/QtWebEngineWidgets.py", line 26, in <module>
    from PyQt5.QtWebKitWidgets import QWebPage as QWebEnginePage
ModuleNotFoundError: No module named 'PyQt5.QtWebKitWidgets'

是否还有其他人偶然发现了这个问题，有人可以提出解决方案吗? 我目前正在通过以下Shell脚本更新python3软件包:

Has anyone else stumbled across this problem, and could anyone suggest a solution? I currently update my python3 packages via the following shell script:

#!/bin/sh

#================================#
#                                #
#### UPDATE PYTHON3 LIBRARIES ####
#                                #
#================================#

### Package List ###
# bs4 - web scraping
# keras - machine learning front end
# lifelines - survival analysis
# matplotlib - plots
# numpy - array-processing package
# pandas - data management
# scipy - open-source software for mathematics, science, and engineering
# seaborn - plots
# selenium - web scraping
# spyder - IDE
# statsmodels - basic statistical methods
# tensorflow - machine learning back end

PACKAGES='bs4 keras lifelines matplotlib numpy pandas scipy seaborn selenium spyder statsmodels tensorflow'

### Update via PIP3 ###
echo 'Updating packages ...'
pip3 install $PACKAGES --user --upgrade --upgrade-strategy="eager"
echo 'Update complete ...'

...并使用以下位于~/.local/share/applications中的Gnome应用程序启动器链接启动spyder:

... and launch spyder using the following Gnome applications launcher link, located in ~/.local/share/applications:

[Desktop Entry]
Type=Application
Version=1.0
Name=Spyder3
GenericName=Spyder3
Comment=The Scientific Python Development Environment - Python 3
Icon=spyder3
TryExec=spyder3
Exec=spyder3 %F
Terminal=false
MimeType=text/x-python;
Categories=Development;Science;IDE;Qt;
Keywords=Development;Science;IDE;Qt;
StartupNotify=true
StartupWMClass=Spyder

推荐答案

(此处为 Spyder维护程序)要解决此问题，您还需要安装pyqtwebengine(除了pyqt5)，像这样

(Spyder maintainer here) To fix this problem you also need to install pyqtwebengine (besides pyqt5), like this

pip install pyqtwebengine

注意:只有在发布最新版本( 3.3.3 )之后，我们才意识到WebEngine与PyQt5是分离的.但这将在我们将于2019年3月发布的下一个版本( 3.3.4 )中得到解决.

Note: We realized WebEngine was separated from PyQt5 only after we released our last version (3.3.3). But that's going to be fixed in our next one (3.3.4), to be released in March/2019.

这篇关于由于通过pip更新了PyQt5，因此无法再启动Spyder的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！