Python:比较两个文件并创建一个显示差异的新文件的麻烦

Question

我正在尝试编写程序，查看两个文件，并创建一个新文件，显示哪些行不同。两个文件的行数相等，每行上都有数字1或-1，例如:

-1
1
1
-1

然而，到目前为止，我所做的代码认为每一行都是不同的，并将它们全部写入新文档:

f1 = open("file1", "r")
f2 = open("file2", "r")
fileOne = f1.readlines()
fileTwo = f2.readlines()
f1.close()
f2.close()
outFile = open("results.txt", "w")
x = 0
for i in fileOne:
   if i != fileTwo[x]:
      outFile.write(i+" <> "+fileTwo[x])
      print i+" <> "+fileTwo[x]
   x += 1
outFile.close()

Answer 1

试试这样:

with open("file1") as f1,open("file2") as f2:
    for x,y in zip(f1,f2):
        if x !=y :
           print " dissimilar lines "

zip()将从两个文件中获取单独的行，然后您可以比较它们:

的例子:

In [12]: a=[1,2,3]
In [13]: b=[4,2,6]
In [14]: for i,(x,y) in enumerate(zip(a,b)):
    if x !=y :
        print "line :{0} ==>  comparing {1} and {2}".format(i,x,y)
line :0 ==>  comparing 1 and 4
line :2 ==>  comparing 3 and 6