How to write List of lists in csv file in python [duplicate]

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This is trivial with the csv module:

with open('output.csv', 'w', newline="") as csvfile:
    writer = csv.writer(csvfile)
    writer.writerows(data)

You already have the header in data as the first row; you can write all rows in one go with the writer.writerows() method. That’s all there is to it, really.

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