复制代码 代码如下:

#diff.py

#!/bin/env python

import sys

if len(sys.argv) <> 3:

print "Usage: " + sys.argv[0] + "file1 file2"

sys.exit(-1)

file1 = sys.argv[1]

file2 = sys.argv[2]

list1 = {}

for line in open(file1):

list1[line.split()[0]] = 1

for line in open(file2):

key = line.split()[0]

if key not in list1:

sys.stdout.write(line)