无法启动与pip3一起安装的ReText – 如何修复？
我正在运行Ubuntu 16.04.5 LTS。
以前我从官方存储库（版本5.3.1-1）安装了ReText编辑器。 我删除了这个版本：
sudo apt-get purge retext sudo apt-get autoremove 现在我想从pip3获取最新版本：
sudo apt install python3-pip sudo pip3 install ReText
安装成功结束。 但是如果尝试使用retext从终端启动retext – 我得到：
$ retext Traceback (most recent call last): File "/usr/local/bin/retext", line 26, in from ReText import datadirs, settings, globalSettings, app_version File "/usr/local/lib/python3.5/dist-packages/ReText/__init__.py", line 24, in from PyQt5.QtCore import QByteArray, QLocale, QSettings, QStandardPaths ImportError: /usr/local/lib/python3.5/dist-packages/PyQt5/QtCore.so: undefined symbol: PySlice_AdjustIndices
如何解决这个问题？
系统信息：
$ pip3 --version pip 18.0 from /usr/local/lib/python3.5/dist-packages/pip (python 3.5) $ python3 --version Python 3.5.2 $ which python3 /usr/bin/python3 $ dpkg -S /usr/bin/python3 python3-minimal: /usr/bin/python3 $ pip3 list --user $ pip3 list Package Version ---------------------------- ---------------------- alabaster 0.7.11 apparmor 2.10.95 apparmor.click 0.3.13.1 apt-xapian-index 0.47 apturl 0.5.2 argcomplete 1.9.4 asn1crypto 0.24.0 astroid 2.0.4 Babel 2.6.0 backcall 0.1.0 beautifulsoup4 4.6.3 bleach 2.1.4 Brlapi 0.6.4 cairocffi 0.9.0 certifi 2018.8.24 cffi 1.11.5 chardet 3.0.4 checkbox-ng 1.0.0 checkbox-support 0.38.0 click 6.7 cloudpickle 0.5.6 command-not-found 0.3 cryptography 2.3.1 cycler 0.10.0 decorator 4.3.0 defer 1.0.6 defusedxml 0.5.0 devscripts 1.0.0 docutils 0.14 ecdsa 0.13 entrypoints 0.2.3 esptool 2.5.0 guacamole 0.9.2 html5lib 1.0.1 idna 2.7 imagesize 1.1.0 indicator-cpufreq 0.2.2 ipykernel 4.9.0 ipython 6.5.0 ipython-genutils 0.2.0 isort 4.3.4 jedi 0.12.1 jeepney 0.3.1 Jinja2 2.10 jsonschema 2.6.0 jupyter-client 5.2.3 jupyter-core 4.4.0 keyring 15.1.0 kiwisolver 1.0.1 language-selector 0.1 lazy-object-proxy 1.3.1 LibAppArmor 2.10.95 lightdm-gtk-greeter-settings 1.2.1 louis 2.6.4 lxml 4.2.5 Magic-file-extensions 0.2 Mako 1.0.7 Markdown 2.6.11 Markups 3.0.0 MarkupSafe 1.0 mate-tweak 3.5.10 matplotlib 2.2.3 mccabe 0.6.1 mistune 0.8.3 nbconvert 5.4.0 nbformat 4.4.0 nose 1.3.7 notify2 0.3.1 numexpr 2.6.8 numpy 1.15.1 numpydoc 0.8.0 onboard 1.2.0 packaging 17.1 padme 1.1.1 pandas 0.23.4 pandocfilters 1.4.2 parso 0.3.1 pep8 1.7.1 pexpect 4.6.0 pickleshare 0.7.4 Pillow 5.2.0 pip 18.0 plainbox 0.38.0 ply 3.11 progressbar 2.5 prompt-toolkit 2.0.4 psutil 5.4.7 ptyprocess 0.6.0 pyaes 1.6.1 pyasn1 0.4.4 pycairo 1.17.1 pycodestyle 2.4.0 pycparser 2.18 pycrypto 2.6.1 pycups 1.9.73 pycurl 7.43.0.2 pyflakes 2.0.0 Pygments 2.2.0 PyGObject 3.30.1 pylint 2.1.1 PyOpenGL 3.1.0 pyparsing 2.2.0 PyQt5 5.11.2 PyQt5-sip 4.19.12 pyserial 3.4 python-apt 1.1.0b1+ubuntu0.16.4.2 python-dateutil 2.7.3 python-dbusmock 0.18 python-debian 0.1.33 python-gnupg 0.4.3 python-markdown-math 0.6 python-systemd 231 pytz 2018.5 pyxdg 0.26 PyYAML 3.13 pyzmq 17.1.2 QtAwesome 0.4.4 qtconsole 4.4.1 QtPy 1.5.0 reportlab 3.5.6 requests 2.19.1 requests-unixsocket 0.1.5 ReText 7.0.3 roman 3.0 rope 0.11.0 scipy 1.1.0 screen-resolution-extra 0.0.0 SecretStorage 3.1.0 selenium 3.14.0 sessioninstaller 0.0.0 setuptools 40.3.0 simplegeneric 0.8.1 sip 4.19.8 six 1.11.0 snowballstemmer 1.2.1 Sphinx 1.8.0 sphinx-rtd-theme 0.4.1 sphinxcontrib-websupport 1.1.0 spyder 3.3.1 spyder-kernels 1.1.0 ssh-import-id 5.6 system-service 0.3 tables 3.4.4 testpath 0.3.1 tornado 5.1.1 traitlets 4.3.2 typed-ast 1.1.0 ubuntu-drivers-common 0.0.0 Ubuntu-Make 18.5 ufw 0.35 urllib3 1.23 urwid 2.0.1 usb-creator 0.3.0 wcwidth 0.1.7 webencodings 0.5.1 wheel 0.31.1 wrapt 1.10.11 xcffib 0.6.0 xdiagnose 3.8.4.1 xkit 0.0.0 XlsxWriter 1.1.0 $ dpkg -l | grep python3- | grep ^ii | awk '{print $2}' ipython3-qtconsole libpython3-all-dev:amd64 libpython3-dev:amd64 libpython3-stdlib:amd64 python3-alabaster python3-all python3-all-dev python3-apparmor python3-apparmor-click python3-apport python3-apt python3-aptdaemon python3-aptdaemon.gtk3widgets python3-aptdaemon.pkcompat python3-argcomplete python3-babel python3-brlapi python3-bs4 python3-cairo python3-cairocffi python3-cffi python3-cffi-backend python3-chardet python3-checkbox-ng python3-checkbox-support python3-click-package python3-commandnotfound python3-cups python3-cupshelpers python3-cycler python3-dateutil python3-dbus python3-dbus.mainloop.qt python3-dbusmock python3-debian python3-decorator python3-defer python3-dev python3-distupgrade python3-docutils python3-gdbm:amd64 python3-gi python3-gi-cairo python3-gnupg python3-gst-1.0 python3-guacamole python3-html5lib python3-jedi python3-jinja2 python3-libapparmor python3-louis python3-lxml python3-magic python3-mako python3-markupsafe python3-matplotlib python3-minimal python3-newt python3-nose python3-notify2 python3-numexpr python3-numpy python3-packagekit python3-padme python3-pandas python3-pandas-lib python3-pep8 python3-pexpect python3-pil:amd64 python3-pip python3-pkg-resources python3-plainbox python3-ply python3-problem-report python3-progressbar python3-psutil python3-ptyprocess python3-pyasn1 python3-pyatspi python3-pycparser python3-pycurl python3-pyflakes python3-pygments python3-pyparsing python3-pyqt4 python3-pyqt5 python3-pyqt5.qtsvg python3-pyqt5.qtwebkit python3-renderpm:amd64 python3-reportlab python3-reportlab-accel:amd64 python3-requests python3-roman python3-scipy python3-selenium python3-setuptools python3-simplegeneric python3-sip python3-six python3-software-properties python3-speechd python3-sphinx python3-sphinx-rtd-theme python3-systemd python3-tables python3-tables-lib python3-tk python3-tz python3-uno python3-update-manager python3-urllib3 python3-wheel python3-xapian1.3 python3-xcffib python3-xdg python3-xkit python3-xlsxwriter python3-yaml python3-zmq $ dpkg -S /usr/lib/python3/dist-packages | sed 's/, /\n/g' python3-libapparmor python3-aptdaemon.pkcompat python3-aptdaemon ubuntu-system-service python3-cairo python3-bs4 python3-apparmor-click python3-renderpm:amd64 python3-pyqt5.qtsvg python3-pycparser python3-pyatspi python3-pyasn1 python3-progressbar python3-problem-report python3-pexpect python3-numexpr python3-matplotlib python3-packagekit python3-numpy python3-nose python3-jedi python3-gst-1.0 python3-decorator python3-cups python3-checkbox-support python3-checkbox-ng python3-plainbox python3-chardet python3-cairocffi language-selector-gnome ufw python3-distupgrade python3-dbus python3-update-manager python3-gi python3-tables-lib python3-setuptools python3-roman python3-requests python3-reportlab python3-pyqt5 python3-sip python3-sphinx-rtd-theme python3-sphinx software-properties-common python3-selenium python3-reportlab-accel:amd64 python3-pyqt4 python3-pygments python3-pyflakes python3-pycurl python3-pkg-resources python3-pep8 python3-pandas-lib python3-ply python3-pil:amd64 python3-ptyprocess python3-pandas python3-padme python3-notify2 ssh-import-id sessioninstaller python3-speechd python3-scipy python3-newt python3-mako xdiagnose ubuntu-drivers-common python3-xapian1.3 python3-wheel python3-urllib3 python3-tz python3-software-properties python3-six python3-simplegeneric python3-pyqt5.qtwebkit python3-pyparsing python3-psutil usb-creator-gtk update-manager ubuntu-make python3-uno apturl apt-xapian-index python3-commandnotfound python3-apt python3.5 lsb-release language-selector-common debconf python3-alabaster usb-creator-common python3-tables python3-systemd python3-magic python3-louis python3-defer python3-brlapi python3-aptdaemon.gtk3widgets indicator-cpufreq software-properties-kde software-properties-gtk screen-resolution-extra python3-zmq python3-yaml python3-xlsxwriter python3-xkit python3-xdg python3-xcffib python3-markupsafe python3-lxml python3-jinja2 python3-dbusmock python3-click-package python3-html5lib python3-guacamole python3-gnupg python3-gi-cairo python3-docutils python3-debian python3-dbus.mainloop.qt python3-dateutil python3-cycler python3-cupshelpers python3-cffi python3-cffi-backend python3-argcomplete gir1.2-unity-5.0:amd64 devscripts blueman python3-babel gir1.2-ibus-1.0:amd64 apturl-common gnome-orca python3-apport onboard mate-tweak lightdm-gtk-greeter-settings ipython3-qtconsole ipython3 hplip gir1.2-dee-1.0 python3-pip python3-apparmor: /usr/lib/python3/dist-packages
非常奇怪的问题。 我今天在其他Ubuntu 16.04.5笔记本电脑上使用相同的方法安装了ReText。
问题是由于第一个系统我已经安装了pip3 ，但是在第二个系统上我今天安装了pip3 。 所以在第二个系统上， pip3下载了所有python-packages的最新版本。
在第一个系统上我安装了Spyder，它需要Qt5（但是更低 – pyqt5 <5.10版本），所以ReText安装并在这里工作没有问题。
解决方案是将Spyder重新安装到较低版本的Qt5（5.9.2）python-packages：
sudo pip3 install spyder
此ReText正常工作后：
所以我已经明白了如何以及为什么这个python依赖会发生:)