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print('Split {0} rows into train={1} and test={2} rows').format(len(dataset), len(trainingSet), len(testSet))

there is an AttributeError: 'NoneType' object has no attribute 'format' for this lines.

please help me to solve this error.

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1 Answer 1

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3

You have to call the .format() on the string, on the result of the print statement. Like this:

print('Split {0} rows into train={1} and test={2} rows'.format(len(dataset), len(trainingSet), len(testSet)))

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