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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 from_bytearray(self, stream):
 """ Constructs this frame from input data stream, consuming as many bytes as necessary from the beginning of the stream. If stream does not contain enough data to construct a complete modbus frame, an EOFError is raised and no data is consumed. :param stream: bytearray to consume data from to construct this frame. :except EOFError: Not enough data for complete frame; no data consumed. """

        fmt = '>HHHBB'
        size_header = struct.calcsize(fmt)
        if len(stream) < size_header:
            raise EOFError

        (
            self.transaction_id,
            self.protocol_id,
            self.length,
            self.unit_id,
            self.fcode
        ) = struct.unpack(fmt, bytes(stream[:size_header]))

        size_total = size_header + self.length - 2
        if len(stream) < size_total:
            raise EOFError

        self.data = stream[size_header:size_total]
        del stream[:size_total]