36 lines
643 B
Python
36 lines
643 B
Python
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())
|
|
|
|
current_file = open(input_file)
|
|
|
|
print("First let's print the whole file: \n")
|
|
|
|
print_all(current_file)
|
|
|
|
print("Now let's rewind, kind of like a tape.")
|
|
|
|
rewind(current_file)
|
|
|
|
print("Let's print three lines:")
|
|
|
|
current_line = 1
|
|
print_a_line(current_line, current_file)
|
|
|
|
#current_line = current_line + 1
|
|
current_line += 1
|
|
print_a_line(current_line, current_file)
|
|
|
|
#current_line = current_line + 1
|
|
current_line += 1
|
|
print_a_line(current_line, current_file)
|