Validate a discount code format

Python data engineering interview problem. Difficulty: beginner. Pattern: Strings. About 10 minutes. Free to practice.

Checkout accepts a discount code string. Fraud wants a strict format check before the code is sent to billing, not a fuzzy 'looks ok' guess.

A checkout form must reject bad discount codes before they reach billing. A valid code is 4 to 8 capital letters, a dash, then exactly 3 digits. Return True only if the whole code matches that format, otherwise False. Write valid_discount_code(code). 'SAVE-100' is valid (4 capital letters, a dash, 3 digits). 'NO' is not valid. The starter file already has the function name and its print lines. Keep them and fill in the body.

Requirements

• The code must be 4 to 8 capital letters.
• Then one dash.
• Then exactly 3 digits.
• Nothing may come before or after.

Constraints

• code is a string.
• The result is True or False.

Examples

Input: valid_discount_code('SAVE-100') Output: True This input follows the stated rules and produces this output.

Topics: lakebench, python, functions.

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