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calc.py
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calc.py
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from PyQt6.QtWidgets import QApplication, QWidget, QLineEdit, QGridLayout, QPushButton
class Calculator(QWidget):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
self.display = QLineEdit(self)
self.display.setReadOnly(True)
self.grid = QGridLayout()
buttons = ["7", "8", "9", "+",
"4", "5", "6", "-",
"1", "2", "3", "*",
"0", ".", "=", "/", "C"]
row = 1
col = 0
for button in buttons:
if col > 3:
col = 0
row += 1
btn = QPushButton(button, self)
btn.clicked.connect(lambda _, b=button: self.append_display(b))
self.grid.addWidget(btn, row, col)
col += 1
self.grid.addWidget(self.display, 0, 0, 1, 4)
self.setLayout(self.grid)
self.setGeometry(300, 300, 300, 300)
self.setWindowTitle("Calculator")
self.show()
def append_display(self, b):
if b == "=":
try:
result = eval(self.display.text())
self.display.setText(str(result))
except:
self.display.setText("Error")
elif b == "C":
self.display.clear()
else:
self.display.insert(b)
if __name__ == "__main__":
app = QApplication([])
calculator = Calculator()
app.exec()