导入pyqtgraph jupyter notebook时出错

运行import pyqtgraph as 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 notebook 3.5.6 中运行 |Anaconda, Inc.| （默认，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这些程序。在他们完美运行之前。我记得在环境中改变的唯一一件事就是安装 Pandas。

我试过重新安装 pyqtgraph 和 pyqt 没有成功