api
http://srinikom.github.io/pyside-docs/search.html?q=QStandardPaths&check_keywords=yes&area=default
pyside2与pyqt api区别
https://wiki.qt.io/Differences_Between_PySide_and_PyQt/zh#.E5.8A.9F.E8.83.BD.E6.80.A7.E5.B7.AE.E5.BC.82
pyqt官网文档（pyside2的api与pyqt几乎相同）
https://www.riverbankcomputing.com/static/Docs/PyQt5/search.html?q=QApplication
pyside2官网
https://wiki.qt.io/Qt_for_Python
qt官网
https://doc.qt.io/qt-5/index.html
文章
https://blog.csdn.net/weixin_33790053/article/details/91730574
https://blog.csdn.net/wenyun_kang/article/details/64439517
获取系统路径
https://blog.csdn.net/wei375653972/article/details/84616465
对话框
https://blog.51cto.com/xvjunjie/2148152
https://blog.csdn.net/jia666666/article/details/81539733
https://www.cnblogs.com/yskn/p/9390967.html
qt designer
https://www.jb51.net/article/182189.htm