python+ pyqt5 实现最简单的计算器
作者：互联网
问题描述：
用python + pyqt5 实现最简单的计算器
【 1： 只能进行 2 个数字的运算；2： 除法的第二位数不能是0 】
运行效果：
问题解决：
全部代码如下： 【 只需要进行打包即可， pyinstaller -F ./calculator.py 】
import sys
import re
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QMainWindow
class Calculator_Window(QMainWindow):
def setupUi(self, CalculatorWindow):
CalculatorWindow.setObjectName("Calculator")
CalculatorWindow.resize(500, 800)
# 1: 先打一条显示器
self.showEdit = QtWidgets.QLineEdit(CalculatorWindow)
self.showEdit.setGeometry(QtCore.QRect(20, 40, 300, 60))
# 2: 打一个 九宫格 ，并把相应的数字打 [ 先打一个主框，左九宫格，右+-*/， 然后用窗口添加该主框 ]
self.containerWidget = QtWidgets.QWidget(CalculatorWindow)
self.containerWidget.setObjectName("containerWidget")
# 3: 1 - 9 数字的布局
self.gridLayoutWidget = QtWidgets.QWidget(self.containerWidget)
self.gridLayoutWidget.setGeometry(QtCore.QRect(20, 100, 300, 500))
self.gridLayoutWidget.setObjectName("gridLayoutWidget")
self.gridLayout = QtWidgets.QGridLayout(self.gridLayoutWidget)
self.gridLayout.setContentsMargins(0, 0, 0, 0) # 这里的 setContentsMargins 是左, 上, 右, 下
self.gridLayout.setObjectName("gridLayout")
self.btn_nmb_1 = QtWidgets.QPushButton(self.gridLayoutWidget)
self.btn_nmb_1.setObjectName("btn_nmb_1")
self.gridLayout.addWidget(self.btn_nmb_1, 0, 0, 1, 1)
self.btn_nmb_2 = QtWidgets.QPushButton(self.gridLayoutWidget)
self.btn_nmb_2.setObjectName("btn_nmb_2")
self.gridLayout.addWidget(self.btn_nmb_2, 0, 1, 1, 1)
self.btn_nmb_3 = QtWidgets.QPushButton(self.gridLayoutWidget)
self.btn_nmb_3.setObjectName("btn_nmb_3")
self.gridLayout.addWidget(self.btn_nmb_3, 0, 2, 1, 1)
self.btn_nmb_4 = QtWidgets.QPushButton(self.gridLayoutWidget)
self.btn_nmb_4.setObjectName("btn_nmb_4")
self.gridLayout.addWidget(self.btn_nmb_4, 1, 0, 1, 1)
self.btn_nmb_5 = QtWidgets.QPushButton(self.gridLayoutWidget)
self.btn_nmb_5.setObjectName("btn_nmb_5")
self.gridLayout.addWidget(self.btn_nmb_5, 1, 1, 1, 1)
self.btn_nmb_6 = QtWidgets.QPushButton(self.gridLayoutWidget)
self.btn_nmb_6.setObjectName("btn_nmb_6")
self.gridLayout.addWidget(self.btn_nmb_6, 1, 2, 1, 1)
self.btn_nmb_7 = QtWidgets.QPushButton(self.gridLayoutWidget)
self.btn_nmb_7.setObjectName("btn_nmb_7")
self.gridLayout.addWidget(self.btn_nmb_7, 2, 0, 1, 1)
self.btn_nmb_8 = QtWidgets.QPushButton(self.gridLayoutWidget)
self.btn_nmb_8.setObjectName("btn_nmb_8")
self.gridLayout.addWidget(self.btn_nmb_8, 2, 1, 1, 1)
self.btn_nmb_9 = QtWidgets.QPushButton(self.gridLayoutWidget)
self.btn_nmb_9.setObjectName("btn_nmb_9")
self.gridLayout.addWidget(self.btn_nmb_9, 2, 2, 1, 1)
# + - * / 的垂直布局
self.verticalLayoutWidget = QtWidgets.QWidget(self.containerWidget)
self.verticalLayoutWidget.setGeometry(QtCore.QRect(340, 100, 70, 450))
self.verticalLayoutWidget.setObjectName("verticalLayoutWidget")
self.verticalLayout = QtWidgets.QVBoxLayout(self.verticalLayoutWidget)
self.verticalLayout.setContentsMargins(0, 0, 0, 0)
self.verticalLayout.setObjectName("verticalLayout")
self.btn_add = QtWidgets.QPushButton(self.verticalLayoutWidget)
self.btn_add.setObjectName("btn_add")
self.verticalLayout.addWidget(self.btn_add)
self.btn_minus = QtWidgets.QPushButton(self.verticalLayoutWidget)
self.btn_minus.setObjectName("btn_minus")
self.verticalLayout.addWidget(self.btn_minus)
self.btn_multiply = QtWidgets.QPushButton(self.verticalLayoutWidget)
self.btn_multiply.setObjectName("btn_multiply")
self.verticalLayout.addWidget(self.btn_multiply)
self.btn_divide = QtWidgets.QPushButton(self.verticalLayoutWidget)
self.btn_divide.setObjectName("btn_divide")
self.verticalLayout.addWidget(self.btn_divide)
self.btn_equal = QtWidgets.QPushButton(self.verticalLayoutWidget)
self.btn_equal.setObjectName("btn_equal")
self.verticalLayout.addWidget(self.btn_equal)
CalculatorWindow.setCentralWidget(self.containerWidget) # 窗口添加该主框
self.retranslateUi(CalculatorWindow) # 设置文字的的函数
QtCore.QMetaObject.connectSlotsByName(CalculatorWindow) # 连接到指定的槽
def retranslateUi(self, CalculatorWindow):
_translate = QtCore.QCoreApplication.translate
CalculatorWindow.setWindowTitle("计算器")
self.showEdit.setText(_translate("CalculatorWindow", " 1 + 1 = 2")) # 显示框
# 1 - 9 按钮上的数字填充
self.btn_nmb_1.setText(_translate("CalculatorWindow", "1"))
self.btn_nmb_2.setText(_translate("CalculatorWindow", "2"))
self.btn_nmb_3.setText(_translate("CalculatorWindow", "3"))
self.btn_nmb_4.setText(_translate("CalculatorWindow", "4"))
self.btn_nmb_5.setText(_translate("CalculatorWindow", "5"))
self.btn_nmb_6.setText(_translate("CalculatorWindow", "6"))
self.btn_nmb_7.setText(_translate("CalculatorWindow", "7"))
self.btn_nmb_8.setText(_translate("CalculatorWindow", "8"))
self.btn_nmb_9.setText(_translate("CalculatorWindow", "9"))
# + - * / 的字符填充
self.btn_add.setText(_translate("CalculatorWindow", "+"))
self.btn_minus.setText(_translate("CalculatorWindow", "-"))
self.btn_multiply.setText(_translate("CalculatorWindow", "*"))
self.btn_divide.setText(_translate("CalculatorWindow", "/"))
self.btn_equal.setText(_translate("CalculatorWindow", "="))
# 给每个按钮的点击事件，统一处理
self.btn_nmb_1.clicked.connect(self.btnClick)
self.btn_nmb_2.clicked.connect(self.btnClick)
self.btn_nmb_3.clicked.connect(self.btnClick)
self.btn_nmb_4.clicked.connect(self.btnClick)
self.btn_nmb_5.clicked.connect(self.btnClick)
self.btn_nmb_6.clicked.connect(self.btnClick)
self.btn_nmb_7.clicked.connect(self.btnClick)
self.btn_nmb_8.clicked.connect(self.btnClick)
self.btn_nmb_9.clicked.connect(self.btnClick)
self.btn_add.clicked.connect(self.btnClick)
self.btn_minus.clicked.connect(self.btnClick)
self.btn_multiply.clicked.connect(self.btnClick)
self.btn_divide.clicked.connect(self.btnClick)
self.btn_equal.clicked.connect(self.btnClick)
showString = ' '
nmb1 = 0 # 第一个数字
nmbOprerator = ''
nmb2 = 0 # 第二个数字
nmb3 = 0 # 第三个数字
def btnClick(self): # 统一处理按钮事件； 思路：数字 + 符号 字符串 = 这种格式
sender = self.sender()
senderText = sender.text()
self.valueNmb(str(senderText))
def valueNmb(self, senderText): # 对按下的按钮进行计算
if (senderText == "+" or senderText == "-" or senderText == "*" or senderText == "/"):
self.showString += " " + senderText + " "
self.nmb1 = re.sub(r'\D', "", self.showString) # 取符号前面的数字为 nmb1
self.nmbOprerator = senderText
self.showRes(str(self.nmb1) + " " + self.nmbOprerator + " ")
elif (senderText == "="):
self.showString += senderText
nmb2Index = self.showString.find(self.nmbOprerator) + 1 # +1 是因为把 + - * / 的符号去掉
self.nmb2 = self.showString[nmb2Index: -1]
self.nmb3 = self.switchCal(int(self.nmb1), str(self.nmbOprerator), int(self.nmb2))
self.showRes(str(self.nmb1) + " " + self.nmbOprerator + " " + str(self.nmb2) + " = " + str(self.nmb3))
else:
self.showString += senderText
self.showRes(self.showString)
def switchCal(self, nmb1, nmbOprerator, nmb2): # nmb3 进行计算
nmb1 = int(nmb1)
nmb2 = int(nmb2)
if (nmbOprerator == "+"):
return nmb1 + nmb2
elif (nmbOprerator == "-"):
return nmb1 - nmb2
elif (nmbOprerator == "*"):
return nmb1 * nmb2
elif (nmbOprerator == "/"):
return nmb1 / nmb2
else:
return 0
def showRes(self, string): # 按钮改变显示的内容
self.showEdit.setText(string)
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
widget = QtWidgets.QMainWindow()
window = Calculator_Window()
window.setupUi(widget)
widget.show()
sys.exit(app.exec())
标签：setObjectName,CalculatorWindow,python,self,pyqt5,QtWidgets,nmb,计算器,btn 来源： https://blog.csdn.net/qq_38192709/article/details/123232530