Simple Calculator in Python 3

from PyQt5 import QtWidgets
import sys


class Button(QtWidgets.QPushButton):
    def __init__(self, text, parent, x, y, w, h, bgcolor, func):
        super().__init__(text, parent)

        self.move(x, y)
        self.resize(w, h)
        self.setStyleSheet("background-color: #%s; color: #FDFEFE;  font-size: 20pt;" % bgcolor)
        self.clicked.connect(func)


class Widget(QtWidgets.QWidget):
    def __init__(self):
        super().__init__()

        self.setMaximumHeight(500)
        self.setMinimumHeight(500)
        self.setMaximumWidth(349)
        self.setMinimumWidth(349)
        self.setWindowTitle('الحاسبة')

        self.lineEdit = QtWidgets.QLineEdit('0', self)
        self.lineEdit.setReadOnly(True)
        self.lineEdit.move(4, 200)
        self.lineEdit.resize(257, 59)

        self.addButtons()

        self.actions = []

    def addButtons(self):
        self.b0 = Button('0', self, 90, 440, 85, 59, "2C3E50", self.zeroClicked)
        self.b1 = Button('1', self, 4, 380, 85, 59, "148F77", self.oneClicked)
        self.b2 = Button('2', self, 90, 380, 85, 59, "239B56", self.twoClicked)
        self.b3 = Button('3', self, 176, 380, 85, 59, "1F618D", self.threeClicked)
        self.b4 = Button('4', self, 4, 320, 85, 59, "17A589", self.fourClicked)
        self.b5 = Button('5', self, 90, 320, 85, 59, "28B463", self.fiveClicked)
        self.b6 = Button('6', self, 176, 320, 85, 59, "2471A3", self.sixClicked)
        self.b7 = Button('7', self, 4, 260, 85, 59, "1ABC9C", self.sevenClicked)
        self.b8 = Button('8', self, 90, 260, 85, 59, "28B463", self.eightClicked)
        self.b9 = Button('9', self, 176, 260, 85, 59, "2980B9", self.nineClicked)
        self.dot = Button(".", self, 4, 440, 85, 59, "2C3E50", self.dotClicked)
        self.re = Button('±', self, 176, 440, 85, 59, "2C3E50", self.MIClicked)
        self.plus = Button('+', self, 262, 380, 85, 59, "EC7063", self.plusClicked)
        self.minuse = Button('-', self, 262, 320, 85, 59, "EC7063", self.minusClicked)
        self.multi = Button('×', self, 262, 260, 85, 59, "EC7063", self.multiplyClicked)
        self.division = Button('÷', self, 262, 200, 85, 59, "EC7063", self.divideClicked)
        self.equl = Button('=' , self, 262, 440, 85, 59, "EC7063", self.calcAns)
        self.bC = Button('C', self, 262, 140, 85, 59, "EC7063", self.Clear)

    def zeroClicked(self):
        if self.lineEdit.text() == "0":
            return

        self.lineEdit.setText(self.lineEdit.text() + "0")

    def oneClicked(self):
        if self.lineEdit.text() == "0":
            self.lineEdit.setText("1")

        else:
            self.lineEdit.setText(self.lineEdit.text() + "1")

    def twoClicked(self):
        if self.lineEdit.text() == "0":
            self.lineEdit.setText("2")

        else:
            self.lineEdit.setText(self.lineEdit.text() + "2")

    def threeClicked(self):
        if self.lineEdit.text() == "0":
            self.lineEdit.setText("3")

        else:
            self.lineEdit.setText(self.lineEdit.text() + "3")

    def fourClicked(self):
        if self.lineEdit.text() == "0":
            self.lineEdit.setText("4")

        else:
            self.lineEdit.setText(self.lineEdit.text() + "4")

    def fiveClicked(self):
        if self.lineEdit.text() == "0":
            self.lineEdit.setText("5")

        else:
            self.lineEdit.setText(self.lineEdit.text() + "5")

    def sixClicked(self):
        if self.lineEdit.text() == "0":
            self.lineEdit.setText("6")

        else:
            self.lineEdit.setText(self.lineEdit.text() + "6")

    def sevenClicked(self):
        if self.lineEdit.text() == "0":
            self.lineEdit.setText("7")

        else:
            self.lineEdit.setText(self.lineEdit.text() + "7")

    def eightClicked(self):
        if self.lineEdit.text() == "0":
            self.lineEdit.setText("8")

        else:
            self.lineEdit.setText(self.lineEdit.text() + "8")

    def nineClicked(self):
        if self.lineEdit.text() == "0":
            self.lineEdit.setText("9")

        else:
            self.lineEdit.setText(self.lineEdit.text() + "9")

    def dotClicked(self):
        if "." in self.lineEdit.text():
            return

        self.lineEdit.setText(self.lineEdit.text() + ".")

    def MIClicked(self):
        text = self.lineEdit.text()
        if not text or text == "0":
            return

        if text[0] == "-":
            self.lineEdit.setText(text[1:])

        else:
            self.lineEdit.setText("-" + text)

    def plusClicked(self):
        text = self.lineEdit.text()
        if text[-1] == ".":
            text = text[:-1]

        if not text:
            self.actions[-1] = "+"
            return

        elif text == "0":
            return

        if "." in text:
            self.actions.append(float(text))

        else:
            self.actions.append(int(text))

        self.actions.append("+")
        self.lineEdit.clear()

    def minusClicked(self):
        text = self.lineEdit.text()
        if text[-1] == ".":
            text = text[:-1]

        if not text:
            self.actions[-1] = "-"
            return

        elif text == "0":
            return

        if "." in text:
            self.actions.append(float(text))

        else:
            self.actions.append(int(text))

        self.actions.append("-")
        self.lineEdit.clear()

    def multiplyClicked(self):
        text = self.lineEdit.text()
        if text[-1] == ".":
            text = text[:-1]

        if not text:
            self.actions[-1] = "×"
            return

        if "." in text:
            self.actions.append(float(text))

        else:
            self.actions.append(int(text))

        self.actions.append("×")
        self.lineEdit.clear()

    def divideClicked(self):
        text = self.lineEdit.text()
        if text[-1] == ".":
            text = text[:-1]

        if not text:
            self.actions[-1] = "÷"
            return

        if "." in text:
            self.actions.append(float(text))

        else:
            self.actions.append(int(text))

        self.actions.append("÷")
        self.lineEdit.clear()

    def calcAns(self):
        if not self.actions:
            return

        text = self.lineEdit.text()
        if text:
            if "." in text:
                self.actions.append(float(text))

            else:
                self.actions.append(int(text))

        i = 1
        ans = self.actions[0]
        while i < len(self.actions):
            action = self.actions[i]
            if len(self.actions) < i + 2:
                break

            if action == "+":
                ans += self.actions[i + 1]

            elif action == "-":
                ans -= self.actions[i + 1]

            elif action == "×":
                ans *= self.actions[i + 1]

            else:
                ans /= self.actions[i + 1]

            i += 2

        self.actions = []
        self.lineEdit.setText(str(ans))

    def Clear(self):
        self.actions = []
        self.lineEdit.setText("0")


def main():
    app = QtWidgets.QApplication(sys.argv)
    window = Widget()
    window.show()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()