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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def bwrite(stream, obj):
 """ Encode a given object to a file or stream. """

    handle = None
    if not hasattr(stream, "write"):
        stream = handle = open(stream, "wb")
    try:
        stream.write(bencode(obj))
    finally:
        if handle:
            handle.close()