User Registration System: Validation & Registration Demo

Scenario and Problem Statement

You are a junior developer at a start-up tasked with building a user registration system for a mobile app. The system must validate user input (name, email, password) before creating an account. The goal is to ensure only valid, secure, and well-formatted data is accepted, improving both user experience and security.

Dataset Description

There is no external dataset. Instead, the system simulates user registration by validating and storing user data in memory. The validation logic is based on:

• Name: Must be a string and longer than 2 characters
• Email: Must have a username, an '@' symbol, and a valid top-level domain (from a predefined list)
• Password: Must be at least 8 characters, include a capital letter, and a number

Actions and Approach

1. Helper Functions: Python functions (validate_name, validate_email, validate_password) are provided in scripts/python_functions.py for input validation.
2. Notebook Workflow: The Jupyter notebook (notebooks/notebook.ipynb) demonstrates how to use these functions to:
   • Inspect function docstrings
   • Validate user input
   • Register users and handle errors
3. Error Handling: The notebook shows how to catch and report validation errors to the user.

Screenshots and Examples

Example: Valid Registration

register_user("Reynaldo", "reynaldo@gmail.com", "Reynaldo3")
# Output: {'name': 'Reynaldo', 'email': 'reynaldo@gmail.com', 'password': 'Reynaldo3'}

Example: Invalid Name

register_user("A", "reynaldo@gmail.com", "Reynaldo3")
# Output: False

Screenshot

Technologies Used

• Python 3
• Jupyter Notebook
• Standard Python libraries (no external dependencies)

Project Structure

python-register-users/
│
├── images/
│   └── img.jpg                # Screenshot/demo image
├── notebooks/
│   └── notebook.ipynb         # Main demonstration notebook
├── scripts/
│   └── python_functions.py    # Validation helper functions
├── README.md                  # Project documentation

Results and Insights

• The system successfully validates user input and prevents invalid registrations.
• Clear error messages help users correct their input.
• The modular design allows easy extension for more complex validation or storage.

Future Work

• Integrate with a real database for persistent storage
• Add more comprehensive password and email validation
• Develop a web or mobile front-end for real user interaction
• Implement unit tests for all validation functions

Acknowledgement

Thanks to the start-up team and previous developers for providing the initial helper functions and project requirements.

Contact Information

For questions or collaboration, contact:

• Your Name: your.email@example.com