Question

我正在使用通过PyQt5用python 3编写的Qt Designer自定义窗口小部件，我不得不使用一个需要更新的sip API的资源文件，但是为此，我必须更新我的python。

我使用的是ubuntu 16.04 LTS，所以我只是从python.org下载了python，就是这样，一切都顺利进行了，如果我在bash中使用“ python3”命令，那么我会成功安装python 3.7 python 3.7环境运行正常。

但是当我执行Qt Designer时，出现以下错误：

Traceback (most recent call last):
  File "/home/ron/Qt/5.11.0/gcc_64/plugins/designer/python/QRoundProgressBarplugin.py", line 3, in <module>
    from PyQt5.QtGui import QIcon
ImportError: /usr/local/lib/python3.5/dist-packages/PyQt5/QtGui.so: undefined symbol: PySlice_AdjustIndices
Traceback (most recent call last):
  File "/home/ron/Qt/5.11.0/gcc_64/plugins/designer/python/analogclockplugin.py", line 26, in <module>
    from PyQt5.QtGui import QIcon, QPixmap
ImportError: /usr/local/lib/python3.5/dist-packages/PyQt5/QtGui.so: undefined symbol: PySlice_AdjustIndices
Traceback (most recent call last):
  File "/home/ron/Qt/5.11.0/gcc_64/plugins/designer/python/counterplugin.py", line 3, in <module>
    from PyQt5.QtGui import QIcon
ImportError: /usr/local/lib/python3.5/dist-packages/PyQt5/QtGui.so: undefined symbol: PySlice_AdjustIndices
Traceback (most recent call last):
  File "/home/ron/Qt/5.11.0/gcc_64/plugins/designer/python/ledplugin.py", line 3, in <module>
    from PyQt5.QtGui import QIcon
ImportError: /usr/local/lib/python3.5/dist-packages/PyQt5/QtGui.so: undefined symbol: PySlice_AdjustIndices
Traceback (most recent call last):
  File "/home/ron/Qt/5.11.0/gcc_64/plugins/designer/python/manometerplugin.py", line 3, in <module>
    from PyQt5.QtGui import QIcon
ImportError: /usr/local/lib/python3.5/dist-packages/PyQt5/QtGui.so: undefined symbol: PySlice_AdjustIndices
Traceback (most recent call last):
  File "/home/ron/Qt/5.11.0/gcc_64/plugins/designer/python/switchplugin.py", line 3, in <module>
    from PyQt5.QtGui import QIcon
ImportError: /usr/local/lib/python3.5/dist-packages/PyQt5/QtGui.so: undefined symbol: PySlice_AdjustIndices
Traceback (most recent call last):
  File "/home/ron/Qt/5.11.0/gcc_64/plugins/designer/python/thermometerplugin.py", line 3, in <module>
    from PyQt5.QtGui import QIcon
ImportError: /usr/local/lib/python3.5/dist-packages/PyQt5/QtGui.so: undefined symbol: PySlice_AdjustIndices

当然，如您所见，Qt Designer正在使用python 3.5中的lib，因此无法找到最新PyQt5（5.11）中存在的符号PySlice_AdjustIndices，但是在/ usr / local / lib中有python3.5和python3.7文件夹，每个文件夹都有PyQt5版本，但是我真的不知道Qt Designer是如何指向该文件夹而不是python3.7文件夹的，知道怎么做吗？

而且，只是让我们知道，很明显，当Qt Designer加载python自定义小部件时会出现问题，我真的不记得我在哪里得到了libpyqt5.so（C ++小部件，告诉设计者如何读取python小部件），但我在最近的PyQt5安装中找不到它，也许该插件指向该文件夹。

有任何提示或帮助吗？

Answer 1

尝试将其插入文件顶部：

import os,sys
sys.path.insert(1,'/usr/local/lib/python3.7/dist-packages')

在python文件的顶部；可以解决吗？

使用Python 3.5而非Python 3.7的Qt Designer

1 个答案: