def __init__(self, content=None):
if content != None:<EOL><INDENT>self.packet = io.StringIO(content)<EOL><DEDENT>else:<EOL><INDENT>self.packet = io.StringIO()<EOL><DEDENT>
Create a new SSH2 Message.

@param content: the byte stream to use as the Message content (passed
    in only when decomposing a Message).
@type content: string