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Python: Your Gateway to
Data Science & Web
Development
Python is a versatile, high-level programming language.
It's interpreted and dynamically typed, perfect for beginners.
This presentation focuses on project-based learning with Python.
Dr.Sudipta Bhattacharya
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Python Fundamentals: Essential
Building Blocks
Data Types
Integers, floats, strings, booleans, lists, dictionaries
Control Flow
Using if, else, elif and loops like for and while
Functions
Defining/calling functions, using arguments and return values
Example
Simple "Hello, World!" script and data manipulation basics
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Data Science Project 1: Exploratory Data Analysis
(EDA)
Pandas & NumPy
Libraries to manipulate and analyze data efficiently
Project Tasks
• Clean and preprocess Titanic dataset
• Create visualizations with Matplotlib and Seaborn
• Compute summary statistics to find patterns
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Data Science Project 2:
Machine Learning Model
Scikit-learn Library
Powerful Python tool for machine learning
Project Steps
• Select features from Iris dataset
• Train classification model
• Evaluate model's accuracy and performance
Goal
Predict categories based on learned data patterns
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Web Development Project 1: Simple Web App
with Flask
Flask Framework
Lightweight micro web
framework in Python
Project Highlights
Create a functional To-Do List
app with routes and templates
Key Skills
Routing, handling user input,
rendering HTML templates
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Web Development Project 2:
Interactive Dashboard with
Dash
Dash Framework
Build analytical web
apps with Python
Project Tasks
• Add visualization
components
• Implement
callbacks for
interactivity
Goal
Create a dynamic,
user-friendly data
explorer
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Key Python Libraries for Projects
Data Science
• Pandas, NumPy
• Scikit-learn
• Matplotlib, Seaborn
Web Development
• Flask, Django
• Dash, Requests
Others
• Beautiful Soup (Scraping)
• TensorFlow, PyTorch (Deep
Learning)
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Next Steps & Resources
Recap Projects
Data analysis, machine learning, and web apps with Python
Practice
Experiment and build your own projects
Explore Resources
Documentation, tutorials, and GitHub repos
Start Your Portfolio
Showcase your Python skills and projects
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Career Paths with Python
• Data Scientist: Analyze complex data sets to derive actionable insights that support business decisions. Use Python
libraries such as Pandas, NumPy, and Scikit-learn to clean, process, and model data. Collaborate with stakeholders to
identify data-driven opportunities and communicate results effectively.
• Machine Learning Engineer: Design and implement machine learning models to automate predictions and decision-
making processes. Work with Python frameworks like TensorFlow or PyTorch to build, train, and deploy models. Optimize
model performance and integrate solutions into production systems.
• Web Developer: Create dynamic and responsive websites and web applications using Python frameworks such as Django
and Flask. Handle both frontend integration and backend server-side logic. Manage databases and APIs to deliver
seamless user experiences.
• Data Analyst: Extract, clean, and visualize data to provide meaningful business intelligence. Utilize Python tools like
Matplotlib, Seaborn, and SQLAlchemy to generate reports and dashboards. Support decision-making by interpreting
trends and patterns within the data.
• Software Engineer: Develop scalable and maintainable applications and backend systems using Python and other
relevant technologies. Write efficient code, perform testing, and troubleshoot issues as part of the software development
lifecycle. Collaborate within development teams to deliver high-quality software products.
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Web-Based Projects Using Python
• Flask Web Apps: Build lightweight, scalable web applications with Python, designed for flexibility and rapid development.
Flask's micro-framework architecture allows you to easily customize and extend functionality to meet various project
needs, from simple websites to complex RESTful APIs.
• Dash Dashboards: Create dynamic data visualizations and interactive interfaces that are ideal for displaying real-time
analytics and insights. Dash enables seamless integration of graphs, charts, and user input elements, making it a powerful
tool for building analytical web applications without extensive frontend development.
• User Interaction: Handle user inputs efficiently through forms, callbacks, and APIs to enhance the user experience.
Python's robust support for processing HTTP requests and event-driven programming allows developers to build
responsive and interactive web features.
• Integration: Connect to databases, APIs, and external services seamlessly for a comprehensive web solution. Python's
extensive ecosystem offers libraries like SQLAlchemy for database management and Requests for API consumption,
enabling smooth communication and data exchange between components.
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Data Science Project 2: Machine Learning Model
Feature Selection
Identify key variables from
the dataset to improve
model accuracy.
Model Training
Use algorithms like
decision trees or logistic
regression to train.
Evaluation
Assess model
performance with metrics
such as accuracy and
recall.
Prediction
Deploy the model to
predict categories on new,
unseen data.