Python zero counter

zerocounter.py

import sys

def find_largest_zero_sequence(filename):
    max_zeros = 0
    current_zeros = 0
    with open(filename, 'rb') as file:
        while True:
            byte = file.read(1)
            if not byte:  # End of file
                break
            if byte == b'\x00':
                current_zeros += 1
            else:
                if current_zeros > max_zeros:
                    max_zeros = current_zeros
                current_zeros = 0
        # Check last sequence if file ends with zero bytes
        if current_zeros > max_zeros:
            max_zeros = current_zeros
    return max_zeros

# Check if the script is given the necessary arguments
if len(sys.argv) != 2:
    print("Usage: python script.py filename")
    sys.exit(1)

filename = sys.argv[1]
largest_zeros = find_largest_zero_sequence(filename)
print(f'The largest contiguous zero bytes in the file is: {largest_zeros}')