parse_endpoint

parse_endpoint(endpoint)

Parse a single endpoint like 'a9' into ('a', 9).

Accepts exactly one ASCII letter followed by one or more digits. Whitespace around the letter and digits is ignored.

Parameters:

endpoint (str) – Endpoint string, e.g. 'a0', 'Z12'.

Returns:

(letter, index) pair.

Raises:

ValueError – If the format is invalid.

Return type:

Tuple[str, int]