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function4.py

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from sys import argv

script, txt = argv

def file_print(f):

print f.read()

def rewind(f):

f.seek(0)

def print_a_line(line_count, f):

print line_count, f.readline()

filename = open(txt)

print "First let us print whole file:"

file_print(filename)

print "Let us rewind the file"

rewind(filename)

print "Print 3 Lines from the file:"

line_count = 10

print_a_line( line_count, filename)

line_count = 15

print_a_line( line_count, filename)

line_count = line_count+1

print_a_line( line_count, filename)