How to use the connexion.request.args.get function in connexion

def release_list(request):
    kwargs = {}
    if request.args.get("product"):
        kwargs["product"] = request.args.get("product")
    if request.args.get("name_prefix"):
        kwargs["name_prefix"] = request.args.get("name_prefix")
    if request.args.get("names_only"):
        kwargs["nameOnly"] = True
    with dbo.begin() as trans:
        ret = dbo.releases.getReleaseInfo(**kwargs, transaction=trans)
        for r in releases_service.get_releases(trans)["releases"]:
            if kwargs.get("product") and r["product"] != kwargs["product"]:
                continue
            if kwargs.get("name_prefix") and not r["name"].startswith(kwargs["name_prefix"]):
                continue

            ret.append(r)

        return ret

def _get_filters(obj, history_table):
    query = get_input_dict()
    where = [False, False]
    where = [getattr(history_table, f) == query.get(f) for f in query]
    where.append(history_table.data_version != null())
    if hasattr(history_table, "product"):
        where.append(history_table.product != null())
        if request.args.get("product"):
            where.append(history_table.product == request.args.get("product"))
    if hasattr(history_table, "channel"):
        where.append(history_table.channel != null())
        if request.args.get("channel"):
            where.append(history_table.channel == request.args.get("channel"))
    if request.args.get("timestamp_from"):
        where.append(history_table.timestamp >= int(request.args.get("timestamp_from")))
    if request.args.get("timestamp_to"):
        where.append(history_table.timestamp <= int(request.args.get("timestamp_to")))
    return where

def get():
    query = Film.query.options(
        joinedload(Film.cast),
    ).paginate(
        connexion.request.args.get("paginationKey", 1),
        connexion.request.args.get("pageSize", 5)
    )
    schema = FilmSchema()
    result = schema.dump(query.items, many=True)
    return jsonify(result), 200

def get():
    query = Film.query.options(
        joinedload(Film.cast),
    ).paginate(
        connexion.request.args.get("paginationKey", 1),
        connexion.request.args.get("pageSize", 5)
    )
    schema = FilmSchema()
    result = schema.dump(query.items, many=True)
    return jsonify(result), 200

query = get_input_dict()
    where = [False, False]
    where = [getattr(history_table, f) == query.get(f) for f in query]
    where.append(history_table.data_version != null())
    if hasattr(history_table, "product"):
        where.append(history_table.product != null())
        if request.args.get("product"):
            where.append(history_table.product == request.args.get("product"))
    if hasattr(history_table, "channel"):
        where.append(history_table.channel != null())
        if request.args.get("channel"):
            where.append(history_table.channel == request.args.get("channel"))
    if request.args.get("timestamp_from"):
        where.append(history_table.timestamp >= int(request.args.get("timestamp_from")))
    if request.args.get("timestamp_to"):
        where.append(history_table.timestamp <= int(request.args.get("timestamp_to")))
    return where

def release_list(request):
    kwargs = {}
    if request.args.get("product"):
        kwargs["product"] = request.args.get("product")
    if request.args.get("name_prefix"):
        kwargs["name_prefix"] = request.args.get("name_prefix")
    if request.args.get("names_only"):
        kwargs["nameOnly"] = True
    return dbo.releases.getReleaseInfo(**kwargs)

def get_rules():
    # TODO: When we switch to Swagger 3, this can move to the Swagger spec
    if request.args.get("timestamp") and request.args.get("product"):
        return problem(status=400, title="Bad Request", detail="Cannot query with a timestamp and a product at the same time")

    if request.args.get("timestamp"):
        rules = dbo.rules.history.getPointInTime(request.args.get("timestamp"))
    else:
        where = {}
        for field in ("product",):
            if request.args.get(field):
                where[field] = request.args[field]

        rules = dbo.rules.getOrderedRules(where=where)
    return jsonify(count=len(rules), rules=rules)

def get(self):
        input_dict = {
            "product": connexion.request.args.get("product"),
            "role": connexion.request.args.get("role"),
            "channel": connexion.request.args.get("channel"),
        }
        return super(ProductRequiredSignoffsHistoryAPIView, self).get(input_dict)