Hi friends! this tutorial is about making a calculator application in PyQt5. The calc.ui file contains information about the gui and main.py is all about the calculator functionality. Copy both the calc.ui and main.py files in a directory and open the terminal and cd to the directory containing both files. Run python3 main.py and calc application will start.
calc.ui
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>352</width>
<height>310</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<widget class="QWidget" name="centralwidget">
<layout class="QGridLayout" name="gridLayout_3">
<item row="0" column="0">
<layout class="QGridLayout" name="gridLayout_2">
<item row="0" column="0">
<widget class="QTextEdit" name="textEdit"/>
</item>
<item row="1" column="0">
<layout class="QGridLayout" name="gridLayout">
<item row="0" column="0">
<layout class="QHBoxLayout" name="horizontalLayout">
<item>
<widget class="QPushButton" name="pushButton">
<property name="text">
<string>%</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_2">
<property name="text">
<string>x^3</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_3">
<property name="text">
<string>AC</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_4">
<property name="text">
<string>Backspace</string>
</property>
</widget>
</item>
</layout>
</item>
<item row="1" column="0">
<layout class="QHBoxLayout" name="horizontalLayout_2">
<item>
<widget class="QPushButton" name="pushButton_5">
<property name="text">
<string>1/x</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_6">
<property name="text">
<string>x^2</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_7">
<property name="text">
<string>sqrt</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_8">
<property name="text">
<string>/</string>
</property>
</widget>
</item>
</layout>
</item>
<item row="2" column="0">
<layout class="QHBoxLayout" name="horizontalLayout_4">
<item>
<widget class="QPushButton" name="pushButton_13">
<property name="text">
<string>7</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_14">
<property name="text">
<string>8</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_15">
<property name="text">
<string>9</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_16">
<property name="text">
<string>*</string>
</property>
</widget>
</item>
</layout>
</item>
<item row="3" column="0">
<layout class="QHBoxLayout" name="horizontalLayout_3">
<item>
<widget class="QPushButton" name="pushButton_9">
<property name="text">
<string>4</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_10">
<property name="text">
<string>5</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_11">
<property name="text">
<string>6</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_12">
<property name="text">
<string>-</string>
</property>
</widget>
</item>
</layout>
</item>
<item row="4" column="0">
<layout class="QHBoxLayout" name="horizontalLayout_6">
<item>
<widget class="QPushButton" name="pushButton_21">
<property name="text">
<string>1</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_22">
<property name="text">
<string>2</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_23">
<property name="text">
<string>3</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_24">
<property name="text">
<string>+</string>
</property>
</widget>
</item>
</layout>
</item>
<item row="5" column="0">
<layout class="QHBoxLayout" name="horizontalLayout_5">
<item>
<widget class="QPushButton" name="pushButton_17">
<property name="text">
<string>+/-</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_18">
<property name="text">
<string>0</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_19">
<property name="text">
<string>.</string>
</property>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton_20">
<property name="text">
<string>=</string>
</property>
</widget>
</item>
</layout>
</item>
</layout>
</item>
</layout>
</item>
</layout>
</widget>
<widget class="QStatusBar" name="statusbar"/>
</widget>
<resources/>
<connections/>
</ui>
calc.py
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'calc.ui'
#
# Created by: PyQt5 UI code generator 5.11.3
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
import re
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(338, 395)
icon = QtGui.QIcon()
icon.addPixmap(QtGui.QPixmap("pyshine.bmp"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
MainWindow.setWindowIcon(icon)
self.mw = MainWindow
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
self.verticalLayout.setObjectName("verticalLayout")
self.gridLayout = QtWidgets.QGridLayout()
self.gridLayout.setObjectName("gridLayout")
self.textEdit = QtWidgets.QTextEdit(self.centralwidget)
self.textEdit.setObjectName("textEdit")
self.gridLayout.addWidget(self.textEdit, 0, 0, 1, 4)
self.pushButton_22 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_22.setObjectName("pushButton_22")
self.gridLayout.addWidget(self.pushButton_22, 1, 0, 1, 1)
self.pushButton_19 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_19.setObjectName("pushButton_19")
self.gridLayout.addWidget(self.pushButton_19, 1, 1, 1, 1)
self.pushButton_23 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_23.setObjectName("pushButton_23")
self.gridLayout.addWidget(self.pushButton_23, 1, 2, 1, 1)
self.pushButton_21 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_21.setObjectName("pushButton_21")
self.gridLayout.addWidget(self.pushButton_21, 2, 0, 1, 1)
self.pushButton_24 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_24.setObjectName("pushButton_24")
self.gridLayout.addWidget(self.pushButton_24, 2, 1, 1, 1)
self.pushButton_17 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_17.setObjectName("pushButton_17")
self.gridLayout.addWidget(self.pushButton_17, 2, 2, 1, 1)
self.pushButton_20 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_20.setObjectName("pushButton_20")
self.gridLayout.addWidget(self.pushButton_20, 2, 3, 1, 1)
self.pushButton_8 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_8.setObjectName("pushButton_8")
self.gridLayout.addWidget(self.pushButton_8, 3, 0, 1, 1)
self.pushButton_10 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_10.setObjectName("pushButton_10")
self.gridLayout.addWidget(self.pushButton_10, 3, 1, 1, 1)
self.pushButton_9 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_9.setObjectName("pushButton_9")
self.gridLayout.addWidget(self.pushButton_9, 3, 2, 1, 1)
self.pushButton_16 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_16.setObjectName("pushButton_16")
self.gridLayout.addWidget(self.pushButton_16, 3, 3, 1, 1)
self.pushButton_5 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_5.setObjectName("pushButton_5")
self.gridLayout.addWidget(self.pushButton_5, 4, 0, 1, 1)
self.pushButton_7 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_7.setObjectName("pushButton_7")
self.gridLayout.addWidget(self.pushButton_7, 4, 1, 1, 1)
self.pushButton_6 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_6.setObjectName("pushButton_6")
self.gridLayout.addWidget(self.pushButton_6, 4, 2, 1, 1)
self.pushButton_13 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_13.setObjectName("pushButton_13")
self.gridLayout.addWidget(self.pushButton_13, 4, 3, 1, 1)
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setObjectName("pushButton")
self.gridLayout.addWidget(self.pushButton, 5, 0, 1, 1)
self.pushButton_3 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_3.setObjectName("pushButton_3")
self.gridLayout.addWidget(self.pushButton_3, 5, 1, 1, 1)
self.pushButton_4 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_4.setObjectName("pushButton_4")
self.gridLayout.addWidget(self.pushButton_4, 5, 2, 1, 1)
self.pushButton_14 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_14.setObjectName("pushButton_14")
self.gridLayout.addWidget(self.pushButton_14, 5, 3, 1, 1)
self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_2.setObjectName("pushButton_2")
self.gridLayout.addWidget(self.pushButton_2, 6, 0, 1, 1)
self.pushButton_12 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_12.setObjectName("pushButton_12")
self.gridLayout.addWidget(self.pushButton_12, 6, 1, 1, 1)
self.pushButton_11 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_11.setObjectName("pushButton_11")
self.gridLayout.addWidget(self.pushButton_11, 6, 2, 1, 1)
self.pushButton_15 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_15.setObjectName("pushButton_15")
self.gridLayout.addWidget(self.pushButton_15, 6, 3, 1, 1)
self.pushButton_18 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_18.setObjectName("pushButton_18")
self.gridLayout.addWidget(self.pushButton_18, 1, 3, 1, 1)
self.verticalLayout.addLayout(self.gridLayout)
MainWindow.setCentralWidget(self.centralwidget)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.actionNew = QtWidgets.QAction(MainWindow)
icon = QtGui.QIcon()
icon.addPixmap(QtGui.QPixmap("pyshine.bmp"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
self.actionNew.setIcon(icon)
self.actionNew.setObjectName("actionNew")
self.actionExit = QtWidgets.QAction(MainWindow)
self.actionExit.setObjectName("actionExit")
self.actionitem1 = QtWidgets.QAction(MainWindow)
self.actionitem1.setObjectName("actionitem1")
self.actionitem2 = QtWidgets.QAction(MainWindow)
self.actionitem2.setObjectName("actionitem2")
self.actionaa = QtWidgets.QAction(MainWindow)
self.actionaa.setObjectName("actionaa")
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
self.pushButton_12.clicked.connect(self.show) #0
self.pushButton.clicked.connect(self.show) #1
self.pushButton_3.clicked.connect(self.show)#2
self.pushButton_4.clicked.connect(self.show)#3
self.pushButton_5.clicked.connect(self.show)#4
self.pushButton_7.clicked.connect(self.show)#5
self.pushButton_6.clicked.connect(self.show)#6
self.pushButton_8.clicked.connect(self.show)#7
self.pushButton_10.clicked.connect(self.show)#8
self.pushButton_9.clicked.connect(self.show)#9
self.pushButton_14.clicked.connect(self.show)#+
self.pushButton_13.clicked.connect(self.show)#-
self.pushButton_16.clicked.connect(self.show)#x
self.pushButton_20.clicked.connect(self.show)#/
self.pushButton_11.clicked.connect(self.show)#.
self.pushButton_18.clicked.connect(self.show)#<=
self.pushButton_15.clicked.connect(self.show)#=
self.pushButton_2.clicked.connect(self.show)#+/-
self.pushButton_23.clicked.connect(self.show)#AC
self.pushButton_19.clicked.connect(self.show)#x^3
self.pushButton_22.clicked.connect(self.show)#%
self.pushButton_21.clicked.connect(self.show)#1/x
self.pushButton_24.clicked.connect(self.show)#x^2
self.pushButton_17.clicked.connect(self.show)#sqrt
self.text=''
self.textEdit.setFontPointSize(24)
self.processed=False
def process(self):
try:
inp=self.text
inp = re.sub(r"\.(?![0-9])","", inp)
val = eval(inp, {'__builtins__':None})
self.text=str(val)
except Exception as e:
self.text = str(e)
self.processed = True
def show(self):
self.textEdit.setFontPointSize(24)
self.text = self.textEdit.toPlainText()
num_list = [str(num) for num in [0,1,2,3,4,5,6,7,8,9,'.']]
op_list = ['+','-','*','/','%']
c_or_ce_list = ['AC']
func_list=['1/x','x^2','sqrt','+/-','x^3']
if self.mw.sender().text()!='Backspace':
if self.mw.sender().text() in num_list :
if self.processed == True:
self.text=''
self.text+=self.mw.sender().text()
self.processed = False
if self.mw.sender().text() in op_list :
self.text+=self.mw.sender().text()
self.processed = False
if self.mw.sender().text() =='=':
self.process()
if self.mw.sender().text() in c_or_ce_list:
self.text=''
self.processed = False
if self.mw.sender().text() in func_list:
if self.mw.sender().text() == func_list[0]:
try:
self.text= str(1/eval(self.text))
except Exception as e:
self.text=str(e)
self.processed = False
if self.mw.sender().text() == func_list[1]:
self.text= str(eval(self.text)**2)
self.processed = False
if self.mw.sender().text() == func_list[2]:
self.text= str(eval(self.text)**0.5)
self.processed = False
if self.mw.sender().text() == func_list[3]:
self.text= str(-1*eval(self.text))
self.processed = False
if self.mw.sender().text() == func_list[4]:
self.text= str(eval(self.text)**3)
self.processed = False
else:
self.text = self.text[0:len(self.text)-1]
self.textEdit.setText(self.text)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
self.pushButton_22.setText(_translate("PyShine Calculator", "%"))
self.pushButton_22.setShortcut(_translate("MainWindow", "%"))
self.pushButton_19.setText(_translate("MainWindow", "x^3"))
self.pushButton_23.setText(_translate("MainWindow", "AC"))
self.pushButton_23.setShortcut(_translate("MainWindow", "AC"))
self.pushButton_21.setText(_translate("MainWindow", "1/x"))
self.pushButton_24.setText(_translate("MainWindow", "x^2"))
self.pushButton_17.setText(_translate("MainWindow", "sqrt"))
self.pushButton_17.setShortcut(_translate("MainWindow", "S"))
self.pushButton_20.setText(_translate("MainWindow", "/"))
self.pushButton_20.setShortcut(_translate("MainWindow", "/"))
self.pushButton_8.setText(_translate("MainWindow", "7"))
self.pushButton_8.setShortcut(_translate("MainWindow", "7"))
self.pushButton_10.setText(_translate("MainWindow", "8"))
self.pushButton_10.setShortcut(_translate("MainWindow", "8"))
self.pushButton_9.setText(_translate("MainWindow", "9"))
self.pushButton_9.setShortcut(_translate("MainWindow", "9"))
self.pushButton_16.setText(_translate("MainWindow", "*"))
self.pushButton_16.setShortcut(_translate("MainWindow", "*"))
self.pushButton_5.setText(_translate("MainWindow", "4"))
self.pushButton_5.setShortcut(_translate("MainWindow", "4"))
self.pushButton_7.setText(_translate("MainWindow", "5"))
self.pushButton_7.setShortcut(_translate("MainWindow", "5"))
self.pushButton_6.setText(_translate("MainWindow", "6"))
self.pushButton_6.setShortcut(_translate("MainWindow", "6"))
self.pushButton_13.setText(_translate("MainWindow", "-"))
self.pushButton_13.setShortcut(_translate("MainWindow", "-"))
self.pushButton.setText(_translate("MainWindow", "1"))
self.pushButton.setShortcut(_translate("MainWindow", "1"))
self.pushButton_3.setText(_translate("MainWindow", "2"))
self.pushButton_3.setShortcut(_translate("MainWindow", "2"))
self.pushButton_4.setText(_translate("MainWindow", "3"))
self.pushButton_4.setShortcut(_translate("MainWindow", "3"))
self.pushButton_14.setText(_translate("MainWindow", "+"))
self.pushButton_14.setShortcut(_translate("MainWindow", "+"))
self.pushButton_2.setText(_translate("MainWindow", "+/-"))
self.pushButton_2.setShortcut(_translate("MainWindow", "#"))
self.pushButton_12.setText(_translate("MainWindow", "0"))
self.pushButton_12.setShortcut(_translate("MainWindow", "0"))
self.pushButton_11.setText(_translate("MainWindow", "."))
self.pushButton_11.setShortcut(_translate("MainWindow", "."))
self.pushButton_15.setText(_translate("MainWindow", "="))
self.pushButton_15.setShortcut(_translate("MainWindow", "Return"))
self.pushButton_18.setText(_translate("MainWindow", "Backspace"))
self.pushButton_18.setShortcut(_translate("MainWindow", "Backspace"))
self.statusbar.setStatusTip(_translate("MainWindow", "Pyshine"))
self.actionNew.setText(_translate("MainWindow", "New"))
self.actionExit.setText(_translate("MainWindow", "Exit"))
self.actionitem1.setText(_translate("MainWindow", "item1"))
self.actionitem2.setText(_translate("MainWindow", "item2"))
self.actionaa.setText(_translate("MainWindow", "aa"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())