import os,re;a=[re.match(r"^(.*)_[0-9a-f]{8}(_[0-9a-f]{64}\.map)$", entry) for entry in os.listdir(".")];a=[(b.group(0), b.group(1)+b.group(2)) for b in a if b];[os.rename(from_, to) for from_, to in a if not os.path.exists(to)]
in the downloadedmaps foldername_crc_sha256.map
to name_sha256.map