Update pycatfile.py

Author: ReikaNekoUwU

pycatfile.py

@@ -9188,7 +9188,7 @@ def CheckCompressionType(infile, formatspecs=__file_format_multi_dict__, filesta
 def CheckCompressionSubType(infile, formatspecs=__file_format_multi_dict__, filestart=0, closefp=True):
     compresscheck = CheckCompressionType(infile, formatspecs, filestart, False)
     curloc = filestart
-    if(not compresscheck):
+    if(not compresscheck and not hasattr(infile, "read")):
         fextname = os.path.splitext(infile)[1]
         if(fextname == ".gz"):
             compresscheck = "gzip"