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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 decode (cls, bytes, cmddict):
 """Decodes a sequence command from an array of bytes, according to the given command dictionary, and returns a new SeqCmd. """

    attrs = SeqCmdAttrs.decode(bytes[0:1])
    delay = SeqDelay   .decode(bytes[1:4])
    cmd   = cmddict    .decode(bytes[4:] )
    return cls(cmd, delay, attrs)