#!/usr/bin/python
import sys
def process(val_):
try:
f = open(val_,"r+")
except IOError:
print "Error! no such file"
sys.exit()
f.seek(0,2)
f.write('\n')
f.close()
if __name__ == '__main__':
try:
val = sys.argv[1]
except IndexError:
print "Error! no argumnet"
sys.exit()
process(val)