我有以下代码:
from sys import argv
script, filename = argv
txt = open(filename)
print "Here's your file %r:" % filename
print txt.read()
print "Type the filename again:"
file_again = raw_input("> ")
txt_again = open(file_again)
print txt_again.read()
而在我的书的练习,它说一个"有你的脚本也做了close()对txt和txt_again变量.当你与他们所做的要关闭文件是很重要的.
如何关闭变量？