zlib-state

import zlib_state import gzip import os # Create a dummy gzipped file for demonstration dummy_content = b"Line 1\nLine 2\nLine 3 (State Capture Point)\nLine 4\n" * 50 with gzip.open("test_data.txt.gz", "wb") as f: f.write(dummy_content) TARGET_LINE = 100 state_to_resume = None position_to_resume = 0 try: # Use GzipStateFile to capture state at a specific point with zlib_state.GzipStateFile('test_data.txt.gz', keep_last_state=True) as f: for i, line in enumerate(f): if i == TARGET_LINE: state_to_resume = f.last_state position_to_resume = f.last_state_pos print(f"Captured state at line {i+1}, byte pos {position_to_resume}") break if state_to_resume and position_to_resume: print(f"\nResuming decompression from line {TARGET_LINE+1}...") with zlib_state.GzipStateFile('test_data.txt.gz') as f_resume: f_resume.zseek(position_to_resume, state_to_resume) remainder = f_resume.read(50) # Read a small portion after resuming print(f"Decompressed remainder (first 50 bytes): {remainder.decode('utf-8').strip()}...") except Exception as e: print(f"An error occurred: {e}") finally: # Clean up the dummy file if os.path.exists("test_data.txt.gz"): os.remove("test_data.txt.gz")