PyQt6学习第一天——基础框架、信号与槽和第一个计算器程序

基础框架

from PySide6.QtWidgets import QApplication, QWidget

class MyWindow(QWidget):
    def __init__(self):
        super().__init__()
        

if __name__ == "__main__":
    app = QApplication()
    window = MyWindow()
    window.show()
    app.exec()

第一个计算器程序

from PySide6.QtWidgets import QWidget, QApplication
from Ui_Calculator import Ui_Form

class calcWindow(QWidget, Ui_Form):
    def __init__(self):
        super().__init__()
        self.setupUi(self)
        self.result = ''
        self.bind()

    def bind(self):
        # 批量为 btn0 到 btn9 添加点击事件
        for i in range(10):
            button = getattr(self, f'btn{i}')
            button.clicked.connect(lambda _, b=button: self.addNumber(b.text()))

        # 为运算按钮添加点击事件
        operators = {
            'btn_multiply': '*',
            'btn_divide': '/',
            'btn_substract': '-',
            'btn_plus': '+'
        }
        
        for btn_name, symbol in operators.items():
            button = getattr(self, btn_name)
            button.clicked.connect(lambda _, s=symbol: self.addNumber(s) if self.isValid() else None)

        self.btn_equal.clicked.connect(self.calcResult)
        self.btn_clear.clicked.connect(self.clearBox)

    def clearBox(self):
        self.result = ''
        self.result_box.clear()

    def calcResult(self):
        try:
            result = str(eval(self.result))
            self.result_box.setText(result)
            self.result = result
        except ZeroDivisionError:
            self.result_box.setText("Cannot divide by zero")
            self.result = ''
        except Exception as e:
            self.result_box.setText("Error")
            self.result = ''

    def isValid(self):
        return self.result_box.text()[-1:].isdigit()

    def addNumber(self, num: str):
        self.result += num
        self.result_box.setText(self.result)

if __name__ == '__main__':
    app = QApplication()
    window = calcWindow()
    window.show()
    app.exec()