def __setattr__(self, field, value):
        """
        Store the LLVM *value* into the named *field*.
        """
        if field.startswith('_'):
            return super(Structure, self).__setattr__(field, value)
        self[self._namemap[field]] = value

        Store the LLVM *value* into the named *field*.
        
numba/core/cgutils.py