Qt设计器使用python3.5而不是python3.7

Question

我正在使用python3到PyQt5编写的Qt Designer的自定义小部件，我必须使用一个需要更新的sipapi的资源文件，但是为了做到这一点，我不得不更新python。在

我在ubuntu 16.04 LTS上，所以我刚从python.org网站就这样，一切顺利进行，我成功地安装了python3.7，如果在bash中使用“python3”命令，python3.7环境运行良好。在

但是，当我执行Qt设计器时，我得到以下错误：

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设计器使用python3.5中的lib，因此无法找到最新PyQt5（5.11）上的符号PySlice_adjustindex，但在/usr/local/lib上，我有python3.5和python3.7文件夹，每个文件夹都有PyQt5版本，但我真的不知道Qt Designer是如何指向那个文件夹而不是python3.7文件夹的，知道怎么做吗？在

和，让它知道，显然当Qt设计器加载Python自定义小部件时，问题就发生了，我不记得我在哪里得到了LIbpyQt5.SO（C++窗口小部件，它告诉设计器如何读取Python小部件），但是我在最近的PyQT5安装中找不到它，也许插件指向文件夹。在

有什么提示或帮助吗？在

Answer 1

请尝试在文件顶部插入以下内容：

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

在您的python文件的顶部；可能是一个变通方法吗？在