比较两个文件并写入新文件，但只输出几行？

Question

我想比较两个txt文件的所有行，但是当我运行代码时它只响应了几个结果，循环没有有效运行，它似乎在File1中漏掉了很多行，只出现了File1的第一行。在

问题：

我的线圈有问题吗？非常感谢

def compareLines(filename1,filename2):

    File1=open(filename1,'r')
    File2=open(filename2,'r')
    File3=open("Result.txt",'w')

    finalList=[]
    for line1 in File1:
        for line2 in File2:
            set1=set(line1.split(" "))
            set2=set(line2.split(" "))
            print line1
            print line2
            similarNumber=len(set1.intersection(set2))/float(len(set1.union(set2)))
            File3.write('Simmilar rate:'+str(similarNumber)+' '+str(len(set1.intersection(set2)))+" words in incoindence\n")
            finalList.append(similarNumber)

    File1.close()
    File2.close()
    File3.close()

    os.remove(filename1)
    os.remove(filename2)

    return finalList

Answer 1

多亏了答案上面。还有我特别感谢Nisan.H和Ashwini Chaudhary，我已经通过您的帮助解决了这个问题，只在“forline2 in File2”前加一行~~~

def compareLines（文件名1，文件名2）：

File1=open(filename1,'r')
File2=open(filename2,'r')
File3=open("Result.txt",'w')

finalList=[]

for line1 in File1:
    File2.seek(0)
    for line2 in File2:
        set1=set(line1.split(" "))
        set2=set(line2.split(" "))
        print line1
        print line2
        similarNumber=len(set1.intersection(set2))/float(len(set1.union(set2)))
        File3.write('Simmilar rate:'+str(similarNumber)+' '+str(len(set1.intersection(set2)))+" words in incoindence\n")
        finalList.append(similarNumber)

File1.close()
File2.close()
File3.close()

os.remove(filename1)
os.remove(filename2)

return finalList

Answer 2

您应该在内部循环中重新打开File2，或者使用file.seek跳到文件的开头，因为在第一次迭代之后，文件指针位于File2的末尾。在

关于file.seek的帮助：

>>> print file.seek.__doc__
seek(offset[, whence]) -> None.  Move to new file position.

Argument offset is a byte count.  Optional argument whence defaults to
0 (offset from start of file, offset should be >= 0); other values are 1
(move relative to current position, positive or negative), and 2 (move
relative to end of file, usually negative,....