Method writer

numpy/lib/tests/test_io.py:285–291

(error_list)

        # and savez functions in multithreaded environment

        def writer(error_list):
            with temppath(suffix='.npz') as tmp:
                arr = np.random.randn(500, 500)
                try:
                    np.savez(tmp, arr=arr)
                except OSError as err:
                    error_list.append(err)

        errors = []
        threads = [threading.Thread(target=writer, args=(errors,))