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ex20.py
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43 lines (30 loc) · 741 Bytes
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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)
rewind(current_file)
print "Let's print three lines:"
current_line = 1
print_a_line(current_line, current_file)
current_line = current_line + 1
print_a_line(current_line, current_file)
current_line = current_line + 1
print_a_line(current_line, current_file)
'''
Result:
First let's print the whole file.
Who are you?
Where are you from?
Where are you going?
Let's print three lines:
1 Who are you?
2 Where are you from?
3 Where are you going?
'''