from sys import argv

script, input_file = argv

def print_all(f):
    print f.read()

def rewind(f):
    f.seek(0)

def print_a_line(line_count, f):
    print line_count, f.readline()
    # readline() reads a single line from a file. It iterates over it, like you
    # would move over a text file. this is like the next() function in JS

current_file = open(input_file)

print "First let's print the entire file.\n"

print_all(current_file)

print "Now, let's rewind. Kind of like a tape.\n"

rewind(current_file)

print "Let's print three lines"

current_line = 1

print_a_line(current_line, current_file)

current_line += 1

print_a_line(current_line, current_file)

current_line += 1

print_a_line(current_line, current_file)
863cd5e77123e555b3bb632deb898bef02a46146
from sys import argv

script, input_file = argv

def print_all(f):
    print f.read()

def rewind(f):
    f.seek(0)

def print_a_line(line_count, f):
    print line_count, f.readline()
    # readline() reads a single line from a file. It iterates over it, like you
    # would move over a text file. this is like the next() function in JS

current_file = open(input_file)

print "First let's print the entire file.\n"

print_all(current_file)

print "Now, let's rewind. Kind of like a tape.\n"

rewind(current_file)

print "Let's print three lines"

current_line = 1

print_a_line(current_line, current_file)

current_line += 1

print_a_line(current_line, current_file)

current_line += 1

print_a_line(current_line, current_file)