ClassMethod Stream2BytesArray(stream As %Stream.Object) As %SYS.Python
{
set builtin = $SYSTEM.Python.Builtins()
set b = builtin.bytearray()
do stream.Rewind()
while 'stream.AtEnd {
set r = $system.Python.Bytes(stream.Read($$$MaxLocalLength))
do b.extend(r)
}
quit b
}