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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 get_item_key(self, item):
 """Return the value of the item 'key'."""

        try:
            ret = item[item['key']]
        except KeyError:
            logger.error("No 'key' available in {}".format(item))
        if isinstance(ret, list):
            return ret[0]
        else:
            return ret