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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 sd_journal_send(**kwargs):
 """ Send a message to the journald log. @param kwargs: Mapping between field names to values, both as bytes. @raise IOError: If the operation failed. """

    # The function uses printf formatting, so we need to quote
    # percentages.
    fields = [
        _ffi.new(
            "char[]", key.encode("ascii") + b'=' + value.replace(b"%", b"%%"))
        for key, value in kwargs.items()]
    fields.append(_ffi.NULL)
    result = _journald.sd_journal_send(*fields)
    if result != 0:
        raise IOError(-result, strerror(-result))