Flask: Build and Deploy Web Apps with Python

Uplatz provides this in-depth course on Flask: Build and Deploy Web Apps with Python. It is a self-paced course consisting of video tutorials. You will be awarded Course Completion Certificate at the end of the course.

What is Flask?

Flask is a lightweight, open-source web framework written in Python. It allows developers to build web applications quickly and with minimal code, making it a popular choice for beginners and professionals alike.

Flask is often called a “micro-framework” because it provides only the essential tools to get a web server up and running. It doesn’t include built-in features like database abstraction or form validation — but it’s highly extensible, so you can add what you need.

How Flask Works

Flask is a lightweight web framework in Python that enables developers to build web applications quickly and with great flexibility. At its core, Flask is designed to handle incoming web requests, process them through defined logic, and return appropriate responses to users, such as web pages or data.

When a user visits a website or interacts with an application built using Flask, their request is directed to the Flask application running on a server. Flask contains a routing system that determines which part of the application should handle a specific URL or request. Each URL is associated with a function that carries out the intended operation, whether it’s displaying a webpage, retrieving data from a database, or processing a form submission.

Once the appropriate function is triggered, Flask executes any necessary business logic. This may involve querying a database, applying calculations, or validating input. After processing, Flask prepares a response. This response could be a complete HTML page rendered using templates, or structured data like JSON, depending on what the application is designed to return.

Finally, Flask sends this response back to the client, usually a web browser or mobile app, completing the interaction. Throughout this process, Flask manages essential components such as request handling, response formatting, session management, and error handling. Its modular design allows developers to extend its capabilities easily by integrating additional tools or libraries, making Flask suitable for both simple projects and more complex applications that require scalability and customization.

Key Features of Flask

1. Lightweight and Minimalistic
   Flask provides the essentials for web development without enforcing a specific project structure or dependencies, giving developers full control.

2. Built-in Development Server
   It includes a simple server for testing and debugging during development.

3. Routing System
   Flask offers a powerful yet simple way to define how different URLs map to functions that handle them.

4. Template Engine (Jinja2)
   Flask uses Jinja2, a modern templating engine, to generate HTML pages dynamically with Python logic embedded.

5. Integrated Debugger
   Flask features a debugger that helps identify and resolve errors during development, including interactive stack traces.

6. Request and Response Handling
   It provides tools to access data from web requests (like form inputs or query parameters) and to structure responses (HTML, JSON, etc.).

7. Session Management
   Flask allows you to store user data across requests using secure cookies.

8. Extensible with Extensions
   There are many community-developed extensions that add features like form handling, authentication, database integration, and more.

9. RESTful Request Dispatching
   Flask makes it easy to build APIs by supporting RESTful patterns and response formatting.

10. Modular Design
    Flask encourages a modular approach to development, allowing applications to be split into reusable components.

11. Compatibility with WSGI
    Flask is built on the WSGI standard, making it compatible with most Python web servers and deployment tools.

12. Large Community and Documentation
    Flask has an active community and comprehensive documentation, making it easy to find support, tutorials, and third-party tools.

Reed Courses Certificate of Completion

Digital certificate - Included

Uplatz Certificate of Completion

Digital certificate - Included

• Flask - all lectures 11:27:41

  • 1: Introduction to Flask Preview 15:57
  • 2: Flask Routing and Views Preview 28:32
  • 3: Flask Templates with Jinja2 34:31
  • 4: Handling Forms and User Input in Flask 33:54
  • 5: Flask Database Integration 21:29
  • 6: Flask API Development with RESTful APIs 19:48
  • 7: Flask Task Management API 36:20
  • 8: User Authentication with Flask-Login 42:04
  • 9: Flask Session Management and Cookies 20:49
  • 10: Flask and Frontend Integration 51:54
  • 11: Flask Background Tasks and Celery 14:35
  • 12: Flask Logging and Error Handling 17:11
  • 13: Flask Deployment and Production Setup 16:41
  • 14: To-Do List App using Flask 43:00
  • 15: Blog Website using Flask 56:06
  • 16: Weather App using Flask 21:39
  • 17: URL Shortener using Flask 25:16
  • 18: Simple E-Commerce Site using Flask 31:58
  • 19: Personal Portfolio Website using Flask 22:37
  • 20: Real-Time Chat Application using Flask 26:05
  • 21: Habit Tracker using Flask 56:24
  • 22: Simple Polling App using Flask 29:28
  • 23: Flask Interview Questions and Answers 21:23

Flask - Course Syllabus

Module 1: Getting Started with Flask

• 1.1 Introduction to Flask: What is Flask? Advantages of using Flask.

• 1.2 Setting Up Your Environment: Installing Python and pip. Creating and activating virtual environments.

• 1.3 Your First Flask Application: Writing a basic "Hello, World!" Flask app and running it.

Module 2: Routing and Views

• 2.1 Flask Routing Basics: Defining routes and associating them with view functions.

• 2.2 Different Routing Methods: Handling various HTTP methods (GET, POST, etc.).

• 2.3 Dynamic Routing: Capturing variable parts in URLs.

• 2.4 Query Parameters: Accessing data passed in the URL.

Module 3: Working with Templates using Jinja2

• 3.1 Introduction to Jinja2: Understanding the concept of template engines.

• 3.2 Template Syntax: Variables, control structures (if, for), and expressions.

• 3.3 Template Inheritance: Creating reusable template layouts.

• 3.4 Filters and Tests: Modifying and checking data within templates.

Module 4: Handling Forms and User Input

• 4.1 HTML Forms in Flask: Creating and rendering HTML forms.

• 4.2 Processing Form Data: Accessing submitted form data in view functions.

• 4.3 Form Validation: Basic techniques for validating user input.

• 4.4 Using Flask-WTF (Optional Introduction): An overview of a more robust form handling library.

Module 5: Database Integration with Flask-SQLAlchemy

• 5.1 Introduction to Flask-SQLAlchemy: Setting up and configuring SQLAlchemy with Flask.

• 5.2 Defining Database Models: Creating Python classes to represent database tables.

• 5.3 Performing CRUD Operations: Creating, Reading, Updating, and Deleting data using SQLAlchemy.

• 5.4 Database Migrations (Basic Concepts): Understanding the need for database schema changes.

Module 6: Building RESTful APIs with Flask

• 6.1 Introduction to RESTful APIs: Understanding REST principles and concepts.

• 6.2 Designing API Endpoints: Defining URL structures for API resources.

• 6.3 Handling Request and Response Data: Working with JSON data in Flask APIs.

• 6.4 HTTP Methods for APIs: Utilizing GET, POST, PUT, DELETE for API actions.

Module 7: Building a Task Management API (Project)

• 7.1 Designing the API Structure: Defining endpoints and data models for a task management system.

• 7.2 Implementing API Endpoints: Creating Flask routes and view functions for task management.

• 7.3 Handling Data Persistence: Integrating with a database to store tasks.

Module 8: User Authentication with Flask-Login

• 8.1 Introduction to User Authentication: Understanding the need for user accounts and security.

• 8.2 Implementing User Registration: Creating forms and logic for user signup.

• 8.3 Implementing User Login and Logout: Handling user login sessions.

• 8.4 Using Flask-Login: Integrating the Flask-Login library for secure authentication.

• 8.5 Password Hashing: Securely storing user passwords.

Module 9: Session Management and Cookies

• 9.1 Understanding HTTP Sessions: How to maintain user state across multiple requests.

• 9.2 Working with Flask Sessions: Storing and retrieving user session data.

• 9.3 Introduction to Cookies: How cookies are used to store data on the client-side.

• 9.4 Setting and Reading Cookies in Flask: Managing cookies within your application.

Module 10: Flask and Frontend Integration

• 10.1 Serving Static Files: Handling CSS, JavaScript, and image files.

• 10.2 Integrating with Bootstrap: Using Bootstrap for responsive and stylish layouts.

• 10.3 Interacting with Vue.js (Basic Concepts): Sending and receiving data between Flask and Vue.js.

• 10.4 Interacting with React (Basic Concepts): Sending and receiving data between Flask and React.

• 10.5 Building APIs for Frontend Consumption: Designing backend APIs that frontend frameworks can use.

Module 11: Handling Background Tasks with Celery

• 11.1 Introduction to Background Tasks: Understanding the need for asynchronous operations.

• 11.2 Setting Up Celery: Installing and configuring Celery with Flask.

• 11.3 Defining and Running Tasks: Creating background jobs using Celery.

• 11.4 Task Queues and Workers: Understanding Celery's architecture.

Module 12: Logging and Error Handling

• 12.1 Implementing Logging in Flask: Configuring logging to track application behavior and errors.

• 12.2 Different Logging Levels: Understanding and using various log severity levels.

• 12.3 Handling Application Errors: Implementing custom error pages and error handling logic.

• 12.4 Debugging Flask Applications: Using Flask's debugging features.

Module 13: Flask Deployment and Production Setup

• 13.1 Deployment Concepts: Understanding different deployment environments.

• 13.2 Choosing a Web Server: Introduction to WSGI servers like Gunicorn and uWSGI.

• 13.3 Basic Deployment on Different Platforms (Overview): Heroku, PythonAnywhere, etc.

• 13.4 Setting up a Production Environment (Basic Security Considerations).

Module 14-22: Practical Project Development

• Module 14: To-Do List Application: Building a complete to-do list application with database integration and user interaction.

• Module 15: Blog Website: Creating a basic blog platform with post creation, display, and potentially user comments.

• Module 16: Weather Application: Integrating with a third-party weather API (e.g., OpenWeather) to display weather information.

• Module 17: URL Shortener: Building a service to shorten long URLs.

• Module 18: Simple E-Commerce Site: Developing a basic online store with product listings and potentially a shopping cart.

• Module 19: Personal Portfolio Website: Creating a website to showcase personal projects and skills.

• Module 20: Real-Time Chat Application: Implementing a simple real-time chat using technologies like WebSockets (if applicable within the course scope).

• Module 21: Habit Tracker Application: Building an application to track and visualize personal habits, including user authentication and data charting.

• Module 22: Simple Polling Application: Creating a web application for creating and participating in polls.

Module 23: Flask Interview Questions and Answers

• 23.1 Common Flask Interview Questions: Discussing frequently asked questions related to Flask concepts.

• 23.2 Providing Detailed Answers: Explaining the reasoning and best practices behind the answers.

1. Beginner Python Developers
   Individuals who know Python basics and want to start building web applications.

2. Aspiring Web Developers
   Students or professionals transitioning into web development from other fields or programming languages.

3. Backend Developers Exploring Python
   Developers with experience in other languages (like PHP, Java, or Node.js) who want to learn Python-based web frameworks.

4. Data Scientists and Analysts
   Those looking to build lightweight dashboards, data interfaces, or internal tools using Python and Flask.

5. Computer Science Students
   Undergraduates or postgraduates looking to strengthen their practical web development skills and build portfolio projects.

6. Startup Founders / Entrepreneurs
   Non-technical founders or technical co-founders who want to prototype web apps quickly using Flask.

7. Software Engineers Preparing for Interviews
   Developers aiming to sharpen full-stack skills, including web development fundamentals, for technical interviews.

8. Automation Engineers / QA Engineers
   Those interested in creating small web interfaces to interact with scripts or backend automation tools.

Passion to learn and succeed!

• Python Web Developer
• Backend Developer
• Full-Stack Developer
• Web Application Developer
• Software Engineer
• Python Developer
• Software Developer
• API Developer
• Junior Python Developer
• Flask Developer
• Technical Co-founder (Startup)
• Data Engineer (with Web App focus)
• Automation Engineer (with Web Interface skills)
• Developer Advocate (Python/Web focus)
• Freelance Web Developer
• Entry-Level Software Developer

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