笨方法学python 习题16

#coding:utf-8
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.")

input("?")

print ("Opening the file..." )
target = open(filename, 'w')

print ("Truncating the file. Goodbye!")
target.truncate()

print ("Now I'm going to ask you for three lines.")

line1 = input("line1: ")
line2 = input("line2: ")
line3 = input("line3: ")

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

target.write(line1)
target.write("\n")
target.write(line2)
target.write("\n")
target.write(line3)
target.write("\n")

print ("And finally, we close it." )
target.close()