import csv
list2 = []
p = 0
with open("test.csv", "r") as csv_file:
    csv_reader = csv.reader(csv_file, delimiter=',')
    for lines in csv_reader:
        if p == 1:
            if lines[0] not in list2:
                list2.append(lines[0])
        p=1
with open("output.csv",'w') as resultFile:
    wr = csv.writer(resultFile, dialect='excel',lineterminator = '\n')
    for item in list2:
        wr.writerow([item,])