def show_on_clicked(self):
        if self.edit.text() <= "":
            amount = 0
        else:
            amount = float(self.edit.text())
        self.controller.init_new_transaction(amount, self.combo.currentText())
dataset/ETHPy150Open javgh/greenaddress-pos-tools/merchantgui.py/MerchantGUI.show_on_clicked/operator `==` -> `<=`