Generates a file of precise size using random bytes.

random_file_generator.py

import os

def make_random_file(path, target_size_bytes, chunk_size=1024 * 1024):
    """
    Create a file filled with random bytes until it reaches target_size_bytes.
    chunk_size just controls memory use while streaming!!!!

     1 = Byte 1 KB = 1024**1, 1 MB = 1024**2, 1 GB = 1024**3

    """
    written = 0

    with open(path, "wb") as f:
        while written < target_size_bytes:
            remaining = target_size_bytes - written
            n = min(chunk_size, remaining)
            f.write(os.urandom(n))
            written += n

    print(f"Created {path}, size = {written} bytes")

# Example usage (UNCOMMENT BELOW)!!!:
#make_random_file("random.bin", ((1024 ** 1) * 1 )) # REMEMBER TO PASS IN BYTES!!! (1024 ** x) * y where x is the powers from kb, mb, gb, etc & y is the amount of that unit