Additional properties are not allowed ('source' was unexpected) Failed validating 'additionalProperties' in display_data: On instance['cells'][11]['outputs'][0]: {'data': {'image/png': 'iVBORw0KGgoAAAANSUhEUgAAAjIAAAGiCAYAAAD9QiyHAAAABHNCSVQICAgIfAhk...', 'text/plain': 'PyPlot.Figure(PyObject <matplotlib.figure.Figure ' 'object at 0x134...'}, 'metadata': {}, 'output_type': 'display_data', 'source': 'julia'}
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