Reference library

Dictionaries & sets

Key–value maps, uniqueness, counting, grouping, and fast lookups.

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Dictionaries & sets easy

Validate dictionary data with sets in Python

Validate a dictionary against required keys and allowed value sets, returning a list of validation errors.

dictionaries sets validation
Python 
def validate_data(data, required_keys, allowed_values=None):
    """
    Validate a dictionary against required keys and optional allowed value sets.
    Returns a list of validation errors (empty list if valid).
    """
    errors = []
    
    # Check for missing required keys
    missing = set(required_keys) - set(…
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Dictionaries & sets — Python code examples

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