from sys import argv

script, filename = argv


print "We're going to erase %r." % filename
print "If you don't want that, hit CTRL-C (^C)."
print "If you do want that, hit RETURN."

raw_input("?")

print "Opening the file..."
target = open(filename, 'w')
target.open(filename, 'r')
print "Here we are:\n"
print target.read()
target.truncate()
target.close()

target.open(filename, 'w')
print "Now I'm going to ask you for three lines."

line1 = raw_input("Line1: ")
line2 = raw_input("Line2: ")
line3 = raw_input("Line3: ")

print "I'm going to write these to the file."

target.write("%s\n%s\n%s\n" % (line1, line2, line3))

print "One moment please..."
target.close()
target = open(filename, 'w+')
print target.read()

enter = 'ENTER'
print "Do you want to close it now? "
print "Push %r for yes. CTRL-C for no." % enter
print "And finally, we close it."

raw_input(": ")
target.close()