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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 stream_create_default_file_stream(fname, isa_read_stream):
 """Wraps openjp2 library function opj_stream_create_default_vile_stream. Sets the stream to be a file stream. This function is only valid for the 2.1 version of the openjp2 library. Parameters fname : str Specifies a file. isa_read_stream: bool True (read) or False (write) Returns ------- stream : stream_t An OpenJPEG file stream. """

    ARGTYPES = [ctypes.c_char_p, ctypes.c_int32]
    OPENJP2.opj_stream_create_default_file_stream.argtypes = ARGTYPES
    OPENJP2.opj_stream_create_default_file_stream.restype = STREAM_TYPE_P
    read_stream = 1 if isa_read_stream else 0
    file_argument = ctypes.c_char_p(fname.encode())
    stream = OPENJP2.opj_stream_create_default_file_stream(file_argument,
                                                           read_stream)
    return stream