导入pyqtgraph jupyter笔记本时出错

Question

运行将pyqtgraph导入为pg

后，出现此错误

---

ImportError                               Traceback (most recent call last)
<ipython-input-2-952aa750c92c> in <module>()
      6 import contextlib
      7
----> 8 import pyqtgraph as pg
      9 import pqtgraph.opengl as gl
     10

~\AppData\Local\conda\conda\envs\3dTracker\lib\site-packages\pyqtgraph\__init__.py in <module>()
     11 ## 'Qt' is a local module; it is intended mainly to cover up the differences
     12 ## between PyQt4 and PySide.
---> 13 from .Qt import QtGui
     14
     15 ## not really safe--If we accidentally create another QApplication, the process hangs (and it is very difficult to trace the cause)

~\AppData\Local\conda\conda\envs\3dTracker\lib\site-packages\pyqtgraph\Qt.py in <module>()
    131 elif QT_LIB == PYQT4:
    132
--> 133     from PyQt4 import QtGui, QtCore, uic
    134     try:
    135         from PyQt4 import QtSvg

ImportError: cannot import name 'QtGui'

---

Windows 10 在jpyter笔记本中运行 3.5.6 | Anaconda，Inc. | （默认值，2018年8月26日，16：05：27）[MSC v.1900 64位（AMD64）]

我有一些使用pyqtgraph的代码，今天我意识到我无法运行那些程序。在他们完美运行之前。 我记得在环境中发生的唯一变化就是安装了熊猫。

我尝试重新安装pyqtgraph和pyqt失败

Answer 1

PyQtGraph自动确定安装了哪个Qt版本。默认情况下，它首先查找PyQt4，然后查找PySide，最后查找PyQt5。查看您的堆栈跟踪信息，似乎有一些旧的，损坏的PyQt4安装，尝试将其导入而没有成功。

您可以通过将PYQTGRAPH_QT_LIB环境变量设置为PyQt5来强制PyQtGraph使用PyQt5。设置环境变量后，您可能需要重新启动Jupyter。