Additional properties are not allowed ('prompt_number' was unexpected) Failed validating 'additionalProperties' in code_cell: On instance['cells'][1]: {'cell_type': 'code', 'execution_count': None, 'metadata': {'collapsed': False}, 'outputs': ['...0 outputs...'], 'prompt_number': '', 'source': 'from unittest import TestCase\n' '[name for name in dir(TestCase) if...'}
Read the FAQ for more information.