Additional properties are not allowed ('prompt_number' was unexpected) Failed validating 'additionalProperties' in code_cell: On instance['cells'][4]: {'cell_type': 'code', 'execution_count': 1, 'metadata': {'collapsed': False}, 'outputs': ['...0 outputs...'], 'prompt_number': '', 'source': 'squares_list = []\n' 'for i in range(10):\n' ' squares_list.append(i*...'}
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