calculate_zerobytes_md5

import hashlib


def calculate_zerobytes_md5(size):
    def multiple(value):
        results = []
        for unit in (0, 1, 2):
            for multi in (16, 32, 64, 128, 256, 512):
                result = value / multi / (1024 ** unit)
                if result.is_integer():
                    results.append(multi * 1024 ** unit)
        return results[-1]
    chunk_size = multiple(size)
    zerobytes = b"\x00" * chunk_size
    iterations = size // chunk_size
    md5 = hashlib.md5()
    for _ in range(iterations):
        md5.update(zerobytes)
    return md5.hexdigest()



# >>> calculate_zerobytes_md5(7743733760)
# '30e109af780fd3763a013b4adf3ceb71'
# >>> calculate_zerobytes_md5(0)
# 'd41d8cd98f00b204e9800998ecf8427e'