【学习纠错帖】TVTK库-Could not find a version that satisfies the requirement PyQt4-4.11.4-cp37-cp37m-win_amd

看MOOC课程《Python科学计算三维可视化》,安装TVTK库,报了个错。python pip install PyQt4-4.11.4-cp37-cp37m-win_amd64 PS D:\2018_BigData\tools\Python_TVTK_3.7> pip install PyQt4-4.11.4-cp37-cp37m-win_amd64 ERROR: Could not find
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