ungleich-learning-circle/kjg/python-the-hard-way/e20.py

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Python
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2020-05-22 13:49:51 +00:00
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)