PyQt5 Quick Start

PyQt5 Quick Start blog series based on "PyQt5 rapid development and practical" learning from, please refer to the original book.
PyQt5 Quick Start (a) PyQt5 Profile
https://blog.51cto.com/9291927/2422184
PyQt5 Quick Start (b) PyQt5 signal slots mechanism
https://blog.51cto.com/9291927/2422187