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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 encode(input, output_filename):
 """Encodes the input data with reed-solomon error correction in 223 byte blocks, and outputs each block along with 32 parity bytes to a new file by the given filename. input is a file-like object The outputted image will be in png format, and will be 255 by x pixels with one color channel. X is the number of 255 byte blocks from the input. Each block of data will be one row, therefore, the data can be recovered if no more than 16 pixels per row are altered. """

    coder = rs.RSCoder(255,223)

    output = []

    while True:
        block = input.read(223)
        if not block: break
        code = coder.encode_fast(block)
        output.append(code)
        sys.stderr.write(".")

    sys.stderr.write("\n")

    out = Image.new("L", (rowstride,len(output)))
    out.putdata("".join(output))
    out.save(output_filename)