ATM

A small terminal ATM I built to mess around with Python. Started as a homework-style toy and grew into something a bit more fun — multiple accounts, persistence between runs, transfers, history, the works.

Runs fully offline. Account state lives in accounts.json, transactions in history.json. Delete those files to reset.

  ┌─────────────────────────────────────┐
  │       PINNACLE BANK ATM v2          │
  │     insert card to begin            │
  └─────────────────────────────────────┘

What it does

• multiple cards, each with its own pin and balance
• pin entry hidden with getpass (no shoulder surfing)
• 3 wrong pins = card locked for 60 seconds (and the lockout sticks across restarts)
• withdraw in GEL / USD / EUR with a 1.5% commission
• deposit money back in
• transfer between cards
• change pin without touching the file
• per-card transaction history (last 10 shown)
• colored output (works on Windows 10+ too)

Run it

python ATM.py

No dependencies. Python 3.7+.

Default cards to play with:

card	pin	balance
card	1111	10000 ₾
demo	0000	500 ₾

Tweak

Rates and the commission live at the top of ATM.py:

RATES = {
    "GEL": (1.0, "₾"),
    "USD": (2.68, "$"),
    "EUR": (3.08, "€"),
}
COMMISSION = 0.015
LOCKOUT_SECONDS = 60

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