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How to Generate a Power Set in Python with Bitmasks

Generate the power set of a small list using a bitmask approach, producing all possible subsets.

def power_set(items):
    """Generate the power set of a list using bitmask approach."""
    n = len(items)
    result = []
    
    for mask in range(1 << n):
        subset = []
        for i in range(n):
            if mask & (1 << i):
                subset.append(items[i])
        result.append(subset)
    
    r…

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