python对比2个文件内容

        file1 = "D:\\1.txt"

        file2 = "D:\\2.txt"

        f_diff = "D:\\diff.txt"

     # ---------- 对比文件内容,输出差异
        f1 = open(file1, "r")
        f2 = open(file2, "r")
        file1 = f1.readlines()
        file2 = f2.readlines()
        f1.close()
        f2.close()
        outfile = open(f_diff, "w")
        flag = 0
        outfile.write("file1独有的数据:\n")
        for i in file1:
            if i not in file2:
                outfile.write(i)
                flag = 1
        outfile.write("file2独有的数据:\n")
        for i in file2:
            if i not in file1:
                outfile.write(i)
                flag = 1
        outfile.close()
        if flag == 1:
            print "数据存在差异,请仔细核对!"



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