Remove useless cast to str

slapos/libnetworkcache.py

@@ -388,7 +388,7 @@ def cmd_upload(*args):
       f = nc.archive(args.url)
     else:
       f = urlopen(args.url)
-    urlmd5 = str(hashlib.md5(args.url.encode()).hexdigest())
+    urlmd5 = hashlib.md5(args.url.encode()).hexdigest()
     nc.upload(f, args.prefix_key + urlmd5 + args.suffix_key, urlmd5=urlmd5,
               file_name=os.path.basename(args.url) or "file",
               **dict(x.split('=', 1) for x in args.meta))
@@ -399,7 +399,7 @@ def cmd_download(*args):
   parser = _newArgumentParser("URL of data to download.")
   args = parser.parse_args(args or sys.argv[1:])
   nc = NetworkcacheClient(args.config)
-  urlmd5 = str(hashlib.md5(args.url.encode()).hexdigest())
+  urlmd5 = hashlib.md5(args.url.encode()).hexdigest()
   key = args.prefix_key + urlmd5 + args.suffix_key
   f = sys.stdout
   shutil.copyfileobj(nc.download(next(nc.select(key))['sha512']),