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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 read_dist_egginfo_json(dist, filename=DEFAULT_JSON):
 """ Safely get a json within an egginfo from a distribution. """


    # use the given package's distribution to acquire the json file.
    if not dist.has_metadata(filename):
        logger.debug("no '%s' for '%s'", filename, dist)
        return

    try:
        result = dist.get_metadata(filename)
    except IOError:
        logger.error("I/O error on reading of '%s' for '%s'.", filename, dist)
        return

    try:
        obj = json.loads(result)
    except (TypeError, ValueError):
        logger.error(
            "the '%s' found in '%s' is not a valid json.", filename, dist)
        return

    logger.debug("found '%s' for '%s'.", filename, dist)
    return obj