Python Projects

Small, self-contained Python programs: interactive CLI applications and a data-analysis exercise. Each file runs directly with python3 <file> - no dependencies beyond the standard library.

Applications

Project	What it does	Concepts shown
banking_app.py	Menu-driven bank account: withdraw, deposit, account details, with balance validation	branching, input validation, state
calculator.py	Looping calculator: add, subtract, multiply, divide, modulus	loops, functions, control flow
flight_hotel_booking.py	Airline + hotel booking flow with seat inventory across five carriers	data modeling with variables, nested decisions
message_encryption.py	Seed-keyed substitution cipher: encrypt and decrypt alphanumeric messages	random.seed determinism, str.translate, functions

Data analysis

Project	What it does	Concepts shown
radish_survey_analysis.py	Tallies a radish-variety vote, normalizes messy input, detects duplicate voters, reports the winner	dictionaries, string cleaning, de-duplication

Run

python3 applications/banking_app.py        # any file runs standalone

Note: flight_hotel_booking.py was renamed from a filename containing a colon, which is invalid on Windows - the repo now clones cleanly everywhere.