Validate and normalize a batch request

Foundation50 min

Implement normalize_batch(payload), returning canonical request records while enforcing shape, exact types, bounds, and unique IDs.

Accept a list of zero to 100 dictionaries, each with exactly id and limit keys.
Require a nonempty string id after stripping whitespace and an exact integer limit from 1 through 20; reject booleans.
Strip IDs without changing case and reject IDs that become duplicates after stripping.
Return new dictionaries in input order. Raise ValueError for every invalid input and do not mutate the input.

EXAMPLE 1

Input[{"id":" A ","limit":2}]

Output[{"id":"A","limit":2}]

Only surrounding whitespace is normalized.

EXAMPLE 2

Input[{"id":"A","limit":true}]

OutputValueError

Boolean values are explicitly excluded.

def normalize_batch(payload):
    raise NotImplementedError("Validate and normalize every request")