见最后四行：
from sys import argv
script, filename = argv
print "we're going to erase %r." % filename
txt = open(filename)
print txt.read()
print "If you do not want that, hit CTRL-C (^C)."
print "If you do want that, hit RETURN."
raw_input("?")
print "Opening the file..."
target = open(filename, 'w')
print "Truncating the file. Good bye!"
target.truncate()
print "now I'm going to ask you for three lines."
line1 = raw_input("line 1: ")
line2 = raw_input("line 2: ")
line3 = raw_input("line 3: ")
print "I'm going to write these to the file."
target.write("%s\n%s\n%s\n" % (line1, line2, line3))
target.close() #Need to close the file when done editing, or else cant open.
print "Here's the updated file!"
txt = open(filename)
print txt.read()
我试图在命令提示符上显示更新的文件，但它没有打印，打印的最后一行显示“这是更新的文件！” 更新的文件在哪里？！？！
更新：我让它工作了，我忘了包含一行“target = open（filename，'w'）”，我试图通过删除我的评论来让眼睛更容易，但是，我不小心删除了这个重要的部分。它现在也在打印我想要的东西。感谢您的帮助，我不确定为什么它现在可以工作。