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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 add_atype(self, ):
 """Add a atype and store it in the self.atypes :returns: None :rtype: None :raises: None """

        i = self.atype_tablev.currentIndex()
        item = i.internalPointer()
        if item:
            atype = item.internal_data()
            atype.projects.add(self._project)
            self.atypes.append(atype)
            item.set_parent(None)