delete_dups.py

import csv
symbols = set([])
new_file = open("new_csv.csv",'w')
x = open("GSE67980_readCounts_withsymbol.csv").read().splitlines()
for line in x:
    symbol = line.split(",")[1]
    if symbol not in symbols:
        new_file.write(line+"\n")
        symbols.add(symbol)
x.close()
new_file.close()