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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:
 async def parse_headers(fp, _class=HTTPMessage):
 """Parses only RFC2822 headers from a file pointer. email Parser wants to see strings rather than bytes. But a TextIOWrapper around self.rfile would buffer too many bytes from the stream, bytes which we later need to read as bytes. So we read the correct bytes here, as bytes, for email Parser to parse. """

    headers = []
    while True:
        line = await fp.readline()
        headers.append(line)
        if len(headers) > _MAXHEADERS:
            raise HttpException("got more than %d headers" % _MAXHEADERS)
        if line in (b'\r\n', b'\n', b''):
            break
    hstring = b''.join(headers).decode('iso-8859-1')
    return email.parser.Parser(_class=_class).parsestr(hstring)