学习使用PySide2制作一个简单的计算器
作者：互联网
使用工具
- python + PySide2
实现思路
- 利用python脚本执行函数eval(expression)，求解算式字符串
- 利用PySide2实现界面
最终效果
代码：
ui_calculator.py
from PySide2 import QtCore, QtGui, QtWidgets
class Ui_Calculator(object):
def setupUi(self, Calculator):
Calculator.setObjectName("Calculator")
Calculator.resize(480, 430)
Calculator.setMinimumSize(QtCore.QSize(480, 430))
Calculator.setMaximumSize(QtCore.QSize(480, 430))
self.horizontalLayout_2 = QtWidgets.QHBoxLayout(Calculator)
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.verticalLayout = QtWidgets.QVBoxLayout()
self.verticalLayout.setSpacing(10)
self.verticalLayout.setObjectName("verticalLayout")
self.label = QtWidgets.QLabel(Calculator)
self.label.setMinimumSize(QtCore.QSize(0, 80))
font = QtGui.QFont()
font.setFamily("黑体")
font.setPointSize(15)
self.label.setFont(font)
self.label.setStyleSheet("background-color: rgb(255, 255, 255);\n"
"")
self.label.setFrameShape(QtWidgets.QFrame.Box)
self.label.setFrameShadow(QtWidgets.QFrame.Sunken)
self.label.setWordWrap(True)
self.label.setObjectName("label")
self.verticalLayout.addWidget(self.label)
self.horizontalLayout = QtWidgets.QHBoxLayout()
self.horizontalLayout.setSpacing(30)
self.horizontalLayout.setObjectName("horizontalLayout")
self.gridLayout = QtWidgets.QGridLayout()
self.gridLayout.setSpacing(12)
self.gridLayout.setObjectName("gridLayout")
self.btnR = QtWidgets.QPushButton(Calculator)
self.btnR.setMinimumSize(QtCore.QSize(60, 60))
self.btnR.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btnR.setFont(font)
self.btnR.setObjectName("btnR")
self.gridLayout.addWidget(self.btnR, 0, 1, 1, 1)
self.btn4 = QtWidgets.QPushButton(Calculator)
self.btn4.setMinimumSize(QtCore.QSize(60, 60))
self.btn4.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btn4.setFont(font)
self.btn4.setObjectName("btn4")
self.gridLayout.addWidget(self.btn4, 2, 0, 1, 1)
self.btn7 = QtWidgets.QPushButton(Calculator)
self.btn7.setMinimumSize(QtCore.QSize(60, 60))
self.btn7.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btn7.setFont(font)
self.btn7.setObjectName("btn7")
self.gridLayout.addWidget(self.btn7, 1, 0, 1, 1)
self.btn8 = QtWidgets.QPushButton(Calculator)
self.btn8.setMinimumSize(QtCore.QSize(60, 60))
self.btn8.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btn8.setFont(font)
self.btn8.setObjectName("btn8")
self.gridLayout.addWidget(self.btn8, 1, 1, 1, 1)
self.btnL = QtWidgets.QPushButton(Calculator)
self.btnL.setMinimumSize(QtCore.QSize(60, 60))
self.btnL.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btnL.setFont(font)
self.btnL.setObjectName("btnL")
self.gridLayout.addWidget(self.btnL, 0, 0, 1, 1)
self.btn9 = QtWidgets.QPushButton(Calculator)
self.btn9.setMinimumSize(QtCore.QSize(60, 60))
self.btn9.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btn9.setFont(font)
self.btn9.setObjectName("btn9")
self.gridLayout.addWidget(self.btn9, 1, 2, 1, 1)
self.btnDel = QtWidgets.QPushButton(Calculator)
self.btnDel.setMinimumSize(QtCore.QSize(60, 60))
self.btnDel.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btnDel.setFont(font)
self.btnDel.setObjectName("btnDel")
self.gridLayout.addWidget(self.btnDel, 0, 2, 1, 1)
self.btn5 = QtWidgets.QPushButton(Calculator)
self.btn5.setMinimumSize(QtCore.QSize(60, 60))
self.btn5.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btn5.setFont(font)
self.btn5.setObjectName("btn5")
self.gridLayout.addWidget(self.btn5, 2, 1, 1, 1)
self.btn6 = QtWidgets.QPushButton(Calculator)
self.btn6.setMinimumSize(QtCore.QSize(60, 60))
self.btn6.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btn6.setFont(font)
self.btn6.setObjectName("btn6")
self.gridLayout.addWidget(self.btn6, 2, 2, 1, 1)
self.btn1 = QtWidgets.QPushButton(Calculator)
self.btn1.setMinimumSize(QtCore.QSize(60, 60))
self.btn1.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btn1.setFont(font)
self.btn1.setObjectName("btn1")
self.gridLayout.addWidget(self.btn1, 3, 0, 1, 1)
self.btn2 = QtWidgets.QPushButton(Calculator)
self.btn2.setMinimumSize(QtCore.QSize(60, 60))
self.btn2.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btn2.setFont(font)
self.btn2.setObjectName("btn2")
self.gridLayout.addWidget(self.btn2, 3, 1, 1, 1)
self.btn3 = QtWidgets.QPushButton(Calculator)
self.btn3.setMinimumSize(QtCore.QSize(60, 60))
self.btn3.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btn3.setFont(font)
self.btn3.setObjectName("btn3")
self.gridLayout.addWidget(self.btn3, 3, 2, 1, 1)
self.btn0 = QtWidgets.QPushButton(Calculator)
self.btn0.setMinimumSize(QtCore.QSize(60, 60))
self.btn0.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btn0.setFont(font)
self.btn0.setObjectName("btn0")
self.gridLayout.addWidget(self.btn0, 4, 0, 1, 1)
self.btnDot = QtWidgets.QPushButton(Calculator)
self.btnDot.setMinimumSize(QtCore.QSize(60, 60))
self.btnDot.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btnDot.setFont(font)
self.btnDot.setObjectName("btnDot")
self.gridLayout.addWidget(self.btnDot, 4, 1, 1, 1)
self.btnNegative = QtWidgets.QPushButton(Calculator)
self.btnNegative.setMinimumSize(QtCore.QSize(60, 60))
self.btnNegative.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btnNegative.setFont(font)
self.btnNegative.setObjectName("btnNegative")
self.gridLayout.addWidget(self.btnNegative, 4, 2, 1, 1)
self.horizontalLayout.addLayout(self.gridLayout)
self.gridLayout_2 = QtWidgets.QGridLayout()
self.gridLayout_2.setSpacing(12)
self.gridLayout_2.setObjectName("gridLayout_2")
self.btnClear = QtWidgets.QPushButton(Calculator)
self.btnClear.setMinimumSize(QtCore.QSize(120, 60))
font = QtGui.QFont()
font.setPointSize(18)
self.btnClear.setFont(font)
self.btnClear.setObjectName("btnClear")
self.gridLayout_2.addWidget(self.btnClear, 0, 0, 1, 2)
self.btnPlus = QtWidgets.QPushButton(Calculator)
self.btnPlus.setMinimumSize(QtCore.QSize(60, 60))
self.btnPlus.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btnPlus.setFont(font)
self.btnPlus.setObjectName("btnPlus")
self.gridLayout_2.addWidget(self.btnPlus, 1, 0, 1, 1)
self.btnMinus = QtWidgets.QPushButton(Calculator)
self.btnMinus.setMinimumSize(QtCore.QSize(60, 60))
self.btnMinus.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btnMinus.setFont(font)
self.btnMinus.setObjectName("btnMinus")
self.gridLayout_2.addWidget(self.btnMinus, 1, 1, 1, 1)
self.btnMulti = QtWidgets.QPushButton(Calculator)
self.btnMulti.setMinimumSize(QtCore.QSize(60, 60))
self.btnMulti.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btnMulti.setFont(font)
self.btnMulti.setObjectName("btnMulti")
self.gridLayout_2.addWidget(self.btnMulti, 2, 0, 1, 1)
self.btnDivide = QtWidgets.QPushButton(Calculator)
self.btnDivide.setMinimumSize(QtCore.QSize(60, 60))
self.btnDivide.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btnDivide.setFont(font)
self.btnDivide.setObjectName("btnDivide")
self.gridLayout_2.addWidget(self.btnDivide, 2, 1, 1, 1)
self.btnMod = QtWidgets.QPushButton(Calculator)
self.btnMod.setMinimumSize(QtCore.QSize(60, 60))
self.btnMod.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btnMod.setFont(font)
self.btnMod.setObjectName("btnMod")
self.gridLayout_2.addWidget(self.btnMod, 3, 0, 1, 1)
self.btnSqrt = QtWidgets.QPushButton(Calculator)
self.btnSqrt.setMinimumSize(QtCore.QSize(60, 60))
self.btnSqrt.setMaximumSize(QtCore.QSize(90, 90))
font = QtGui.QFont()
font.setPointSize(18)
self.btnSqrt.setFont(font)
self.btnSqrt.setObjectName("btnSqrt")
self.gridLayout_2.addWidget(self.btnSqrt, 3, 1, 1, 1)
self.btnEqual = QtWidgets.QPushButton(Calculator)
self.btnEqual.setMinimumSize(QtCore.QSize(120, 60))
font = QtGui.QFont()
font.setPointSize(18)
self.btnEqual.setFont(font)
self.btnEqual.setObjectName("btnEqual")
self.gridLayout_2.addWidget(self.btnEqual, 4, 0, 1, 2)
self.horizontalLayout.addLayout(self.gridLayout_2)
self.verticalLayout.addLayout(self.horizontalLayout)
self.horizontalLayout_2.addLayout(self.verticalLayout)
self.retranslateUi(Calculator)
QtCore.QMetaObject.connectSlotsByName(Calculator)
def retranslateUi(self, Calculator):
Calculator.setWindowTitle(QtWidgets.QApplication.translate("Calculator", "Dialog", None, -1))
self.label.setText(QtWidgets.QApplication.translate("Calculator", "TextLabel", None, -1))
self.btnR.setText(QtWidgets.QApplication.translate("Calculator", ")", None, -1))
self.btn4.setText(QtWidgets.QApplication.translate("Calculator", "4", None, -1))
self.btn7.setText(QtWidgets.QApplication.translate("Calculator", "7", None, -1))
self.btn8.setText(QtWidgets.QApplication.translate("Calculator", "8", None, -1))
self.btnL.setText(QtWidgets.QApplication.translate("Calculator", "(", None, -1))
self.btn9.setText(QtWidgets.QApplication.translate("Calculator", "9", None, -1))
self.btnDel.setText(QtWidgets.QApplication.translate("Calculator", "<-", None, -1))
self.btn5.setText(QtWidgets.QApplication.translate("Calculator", "5", None, -1))
self.btn6.setText(QtWidgets.QApplication.translate("Calculator", "6", None, -1))
self.btn1.setText(QtWidgets.QApplication.translate("Calculator", "1", None, -1))
self.btn2.setText(QtWidgets.QApplication.translate("Calculator", "2", None, -1))
self.btn3.setText(QtWidgets.QApplication.translate("Calculator", "3", None, -1))
self.btn0.setText(QtWidgets.QApplication.translate("Calculator", "0", None, -1))
self.btnDot.setText(QtWidgets.QApplication.translate("Calculator", ".", None, -1))
self.btnNegative.setText(QtWidgets.QApplication.translate("Calculator", "-/+", None, -1))
self.btnClear.setText(QtWidgets.QApplication.translate("Calculator", "C", None, -1))
self.btnPlus.setText(QtWidgets.QApplication.translate("Calculator", "+", None, -1))
self.btnMinus.setText(QtWidgets.QApplication.translate("Calculator", "-", None, -1))
self.btnMulti.setText(QtWidgets.QApplication.translate("Calculator", "*", None, -1))
self.btnDivide.setText(QtWidgets.QApplication.translate("Calculator", "/", None, -1))
self.btnMod.setText(QtWidgets.QApplication.translate("Calculator", "%", None, -1))
self.btnSqrt.setText(QtWidgets.QApplication.translate("Calculator", "sqrt", None, -1))
self.btnEqual.setText(QtWidgets.QApplication.translate("Calculator", "=", None, -1))
calculator.py
import sys
from math import sqrt
from PySide2.QtCore import *
from PySide2.QtGui import *
from PySide2.QtWidgets import *
from ui_calculator import Ui_Calculator
class Window(QWidget,Ui_Calculator):
def __init__(self,parent = None):
super().__init__()
self.setupUi(self)
# 需要用脚本求解的算式字符串
self.expression = str()
self.label.setText(self.expression)
# 获取ui文件中的QPushButton对象
btnList = self.findChildren(QPushButton)
# 信号槽连接
for btn in btnList:
btn.clicked.connect(self.slotFunction)
@Slot()
def slotFunction(self):
dict = {self.btn0:'0',self.btn1:'1',self.btn2:'2',self.btn3:'3',
self.btn4:'4',self.btn5:'5',self.btn6:'6',self.btn7:'7',
self.btn8:'8',self.btn9:'9',self.btnL:'(',self.btnR:')',
self.btnDot:'.',self.btnNegative:'-',self.btnPlus:'+',
self.btnMinus:'-',self.btnMulti:'*',self.btnDivide:'/',
self.btnSqrt:'sqrt',self.btnMod:'%'
}
if self.sender() in dict.keys():
value = dict.get(self.sender())
if '=' not in self.expression:
self.expression += value
elif self.sender() is self.btnDel: # '<-'按键
# 判断算式是否为空
if len(self.expression):
# 判断是否算出答案，是则算式中含=，否则不含=
if '=' not in self.expression:
self.expression = self.expression[:-1] # 删除末尾一个字符
else:
self.expression = str() # 删除整个算式
elif self.sender() is self.btnClear: # 'C'按键
self.expression = str()
elif self.sender() is self.btnEqual: # '='按键
if '=' not in self.expression and len(self.expression):
try:
result = eval(self.expression)
self.expression += ('='+str(result))
except:
self.expression += '=Error'
else:
pass
self.label.setText(self.expression)
if __name__ == '__main__':
app =QApplication(sys.argv)
w = Window()
w.show()
sys.exit(app.exec_())
学习练手项目，若有不足，欢迎批评指正。
标签：QSize,制作,self,60,PySide2,计算器,font,QtCore,Calculator 来源： https://blog.csdn.net/ssspppfff/article/details/104863655