Pyside2教程：使用正则表达式进行输入校验

import sys
from PySide2 import QtWidgets as qtw
from PySide2 import QtGui as qtg
from PySide2 import QtCore as qtc

# 将主程序封装成类
class MainWindow(qtw.QWidget):
    def __init__(self):
        # 引入父类的__init__方法
        super().__init__(parent=None)
        # Main UI code goes here
        inventory_number = qtw.QLineEdit(self)
        entry_validator = qtg.QRegExpValidator(r'^[A-HJ-NP-Z]{2}-\d{3}-\d{4}[A-HJ-NP-Z]$')
        inventory_number.setValidator(entry_validator)
        # End main UI code
        # 显示主窗口
        self.show()

if __name__ == '__main__':
    app = qtw.QApplication()
    main_window = MainWindow()
    sys.exit(app.exec_())