`fname = input("Enter file name: ")
if len(fname) < 1 : fname = "mbox-short.txt"
fh = open(fname)
i = 0
count = 0
with open(fname, 'r') as fh:
    for line in fh:
        temp = line.split()
        #print(temp[0])
        count+=1
        print(count)`