笨方法学Python 习题16

笨方法学Python 习题16

from sys import argv

script, filename = argv

print("We're going to erease {0}.".format(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')

target.write(line1 + '\n' + line2 + '\n' + line3) 
# 课后练习2 

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