Reference library

Dictionaries & sets

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

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Dictionaries & sets easy

Filter Dictionary Keys by Prefix in Python

Use a dict comprehension to build a new dictionary containing only keys that start with a given prefix.

dict-comprehension filtering dictionaries
Python 
def filter_dict_keys(data, prefix="temp_"):
    """
    Filter a dictionary by keeping only keys that start with a given prefix.
    Uses a dict comprehension to build a new dictionary.
    """
    if not isinstance(data, dict):
        raise ValueError("data must be a dictionary")
    return {key: value for key, valu…
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