def test_view_setattr_machinery(attr, subset_func, subset_func2):
    # Tests that setting attributes on a view doesn't mess anything up too bad
    adata = gen_adata((10, 10))
    view = adata[subset_func(adata.obs_names), subset_func2(adata.var_names)]

    actual = view.copy()
    setattr(view, attr, getattr(actual, attr))
    assert_equal(actual, view, exact=True)
def __exit__(self, exc_type, exc_value, traceback):
        connection = get_connection(self.using)
        try:
            self._no_monkey.__exit__(self, exc_type, exc_value, traceback)
        except DatabaseError:
            transaction_states[self.using].rollback()
        else:
            if not connection.closed_in_transaction and exc_type is None and \
                    not connection.needs_rollback:
                if transaction_states[self.using]:
                    transaction_states[self.using].commit()
            else:
                transaction_states[self.using].rollback()