import sys

output = ""
fname = sys.argv[1]
inputFile = open(fname, "r")
lines = inputFile.readlines()
for line in lines:
    print(line)
    if not (line in output):
        output += line
inputFile.close
outputFile = open("striped_"+fname, "w")
outputFile.write(output)
outputFile.close

# $ python remove_dup_line.py foo.txt
# Output: striped_foo.txt