Why is there implemented a default blank row when writing csv from python linked list? [duplicate]

I have an example of writing a csv from a python linked list:

import csv# field names fields = ['Name', 'Branch', 'Year', 'CGPA'] # data rows of csv file rows = [ ['Nikhil', 'COE', '2', '9.0'],      ['Sanchit', 'COE', '2', '9.1'],      ['Aditya', 'IT', '2', '9.3'],      ['Sagar', 'SE', '1', '9.5'],      ['Prateek', 'MCE', '3', '7.8'],      ['Sahil', 'EP', '2', '9.1']] with open('Test.csv', 'w') as f:# using csv.writer method from CSV package    write = csv.writer(f)    write.writerow(fields)    write.writerows(rows)

This works fine, except I have the following result:

Name,Branch,Year,CGPANikhil,COE,2,9.0Sanchit,COE,2,9.1Aditya,IT,2,9.3Sagar,SE,1,9.5Prateek,MCE,3,7.8Sahil,EP,2,9.1

As you can see, in my output csv file I have blank lines between the data. I don't understand where these unwanted line breaks come from.

Why is there an extra row on default? What is its purpose since it's not there in the input data?