pyqt实现计算器界面

[python]代码库

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QLineEdit, QVBoxLayout, QHBoxLayout


class Calculator(QWidget):
    def __init__(self):
        super().__init__()
        self.setWindowTitle('Calculator')
        self.edit = QLineEdit()
        self.edit.setReadOnly(True)
        layout = QVBoxLayout()
        layout.addWidget(self.edit)
        buttons = [
            ['7', '8', '9', '+'],
            ['4', '5', '6', '-'],
            ['1', '2', '3', '*'],
            ['0', '.', '=', '/']
        ]
        for row in buttons:
            button_row = QHBoxLayout()
            for label in row:
                button = QPushButton(label)
                button.clicked.connect(self.button_clicked)
                button_row.addWidget(button)
            layout.addLayout(button_row)
        self.setLayout(layout)

    def button_clicked(self):
        button = self.sender()
        if button.text() == '=':
            self.edit.setText(str(eval(self.edit.text())))
        else:
            self.edit.setText(self.edit.text() + button.text())

if __name__ == '__main__':
    app = QApplication(sys.argv)
    calculator = Calculator()
    calculator.show()
    sys.exit(app.exec_())

[代码运行效果截图]