Additional properties are not allowed ('prompt_number' was unexpected) Failed validating 'additionalProperties' in code_cell: On instance['cells'][7]: {'cell_type': 'code', 'execution_count': None, 'metadata': {'collapsed': False}, 'outputs': ['...0 outputs...'], 'prompt_number': '', 'source': 'i = 42\n' 'r = 31.97\n' 'c = 2.2 + 3.3j\n' 's = "String"\n' 'lst = ["zero", "one...'}
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