Build a Web Browser using Python with Code Example

In this tutorial, we wil learn how to build a web browser from scratch using Python. This tutorial will show you how to use the PyQt5 library to create a basic web browser that can be used to navigate to websites.

To build a web browser from scratch with Python we follow these steps

• Step 1: How to install these libraries
• Step 2: Importing required modules
• Step 3: Functions definition and creation of classes
• Step 4: Coding for buttons and their functionalities

Step 1: How to install these libraries

To install the PyQt5 library, enter the following command in the cmd:

pip install PyQt5

To install the PyQtWebEngine library, enter the following command in the cmd:

pip install PyQtWebEngine

Step 2: Importing required modules:

import sys
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtWebEngineWidgets import *

Step 3: Functions definition and creation of classes

class MainWindow(QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.browser = QWebEngineView()
        self.browser.setUrl(QUrl('https://google.com'))
        self.setCentralWidget(self.browser)
        self.showMaximized()

Step 4: Coding for buttons and their functionalities

 navbar = QToolBar()
        self.addToolBar(navbar)

        back_btn = QAction('Back', self)
        back_btn.triggered.connect(self.browser.back)
        navbar.addAction(back_btn)

        forward_btn = QAction('Forward', self)
        forward_btn.triggered.connect(self.browser.forward)
        navbar.addAction(forward_btn)

        reload_btn = QAction('Reload', self)
        reload_btn.triggered.connect(self.browser.reload)
        navbar.addAction(reload_btn)

        home_btn = QAction('Home', self)
        home_btn.triggered.connect(self.navigate_home)
        navbar.addAction(home_btn)

Full Source Code

import sys
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtWebEngineWidgets import *


class MainWindow(QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.browser = QWebEngineView()
        self.browser.setUrl(QUrl('https://google.com'))
        self.setCentralWidget(self.browser)
        self.showMaximized()

        # navbar
        navbar = QToolBar()
        self.addToolBar(navbar)

        back_btn = QAction('Back', self)
        back_btn.triggered.connect(self.browser.back)
        navbar.addAction(back_btn)

        forward_btn = QAction('Forward', self)
        forward_btn.triggered.connect(self.browser.forward)
        navbar.addAction(forward_btn)

        reload_btn = QAction('Reload', self)
        reload_btn.triggered.connect(self.browser.reload)
        navbar.addAction(reload_btn)

        home_btn = QAction('Home', self)
        home_btn.triggered.connect(self.navigate_home)
        navbar.addAction(home_btn)

        self.url_bar = QLineEdit()
        self.url_bar.returnPressed.connect(self.navigate_to_url)
        navbar.addWidget(self.url_bar)

        self.browser.urlChanged.connect(self.update_url)

    def navigate_home(self):
        self.browser.setUrl(QUrl('https://copyassignment.com'))

    def navigate_to_url(self):
        url = self.url_bar.text()
        self.browser.setUrl(QUrl(url))

    def update_url(self, q):
        self.url_bar.setText(q.toString())


app = QApplication(sys.argv)
QApplication.setApplicationName('CopyAssignment Browser')
window = MainWindow()
app.exec_()

Output:

Hope this browser project of creating a Web Browser Using Python will definitely help you to boost your skills and will help you get a strong grip on various Python librariesH

Happy Coding !!!

#python