Memory leaks when decompress #1

It's seems maybe there's some memory leak when call unlzw.unlzw(). I have written a script using this package to decompress about 300 ~ 400 .Z files download from the FTP server of www.igs.org (e.g. ftp://cddis.gsfc.nasa.gov/pub/gps/data/daily/2018/340/18d/). It ate all my memories and then triggered an OSError finally.

I'm using:

• Python 3.6.7 on Linux;
• Multiprocess by concurent.futures with 16 threads when decompress.