indexed_gzip_file_index_creation_for_random_access_seeking.py

1import indexed_gzip as igzip
2
3# Open a gzipped file
4# The 'index_file' parameter is optional; 
5# if provided, the index will be saved/loaded from it.
6with igzip.IndexedGzipFile('large_file.gz') as f:
7
8    # Build the index so we can seek.
9    # This may take some time for large files.
10    f.build_export_index()
11
12    # Now we can seek to any location in 
13    # the uncompressed data stream.
14    f.seek(123456)
15
16    # And read data from that location.
17    data = f.read(1024)