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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(self, key):
 """Get the string representation of the object stored in DynamoDB under this key, convert it back to an object using the 'from_string' unmarshalling method passed in the constructor and return the object. Return None if no object found. """

        self._get_table()
        s = self.table.get_item(key=key)
        log.debug("Retrieved from key '%s' the object: '%s'" % (key, s['value']))
        return self.from_string(s['value'])