import os def split_file(input_file, output_dir, chunk_size): if not os.path.exists(output_dir): os.makedirs(output_dir) file_size = os.path.getsize(input_file) base_name = os.path.basename(input_file) num_chunks = (file_size + chunk_size - 1) // chunk_size print(f"Total size: {file_size} bytes, split to {num_chunks} files") with open(input_file, 'rb') as f: for i in range(num_chunks): part_filename = os.path.join(output_dir, f"{base_name}.part{i + 1:03d}") with open(part_filename, 'wb') as part_file: bytes_written = 0 while bytes_written < chunk_size: buffer = f.read(min(1024 * 1024, chunk_size - bytes_written)) if not buffer: break part_file.write(buffer) bytes_written += len(buffer) print(f"Write to: {part_filename} Size: {bytes_written} bytes") if __name__ == '__main__': input_file = "data/BIOSCAN_1M/split_data/BioScan_data_in_splits.hdf5" output_dir = "data/BIOSCAN_1M/split_data/splitted_files" chunk_size = 45 * (1024 ** 3) split_file(input_file, output_dir, chunk_size)