# Documentation > When writing, the options argument can be a dictionary providing advanced ~~decompression~~ **compression** parameters; https://github.com/python/cpython/blob/68fcb958eb0c023cb895217fdf384206b09d12e8/Doc/library/compression.zstd.rst?plain=1#L76 https://github.com/python/cpython/blob/68fcb958eb0c023cb895217fdf384206b09d12e8/Doc/library/compression.zstd.rst?plain=1#L120 <!-- gh-linked-prs --> ### Linked PRs * gh-143437 * gh-143444 <!-- /gh-linked-prs -->