用Python逐行比较两个文本文件

Question

I have two text files that I want to compare. First file contains unique items, and the second file contains same items but repeated numerous times. I want to see how many times each line is repeated in the second file. This is what I wrote:

import os
import sys

f1 = open('file1.txt')  # this has the 27 unique lines, 
f1data = f1.readlines()

f2 = open('file2.txt')  # this has lines repeated various times, with a total of 11162 lines
f2data = f2.readlines()

sys.stdout = open("linecount.txt", "w")


for line1 in f1data:
    linecount = 0
    for line2 in f2data:
        if line1 in line2:
        linecount+=1

    print line2, crime

The problem is, when I add up the line count result it returns 11586, instead of 11162. What is the reason for this increase in the line count?

Is there another way of getting a line frequency output using Python?

Answer 1

https://docs.python.org/2.7/reference/expressions.html#in :

For the Unicode and string types, x in y is true if and only if x is a substring of y .

Instead of

    if line1 in line2:

I think you meant to write

    if line1 == line2:

---

Or maybe replace the whole

for line2 in f2data:
    if line1 in line2:
        linecount+=1

block by

if line1 in f2data:
    linecount += 1

Answer 2

it is not working even if we change the code a bit. I got some better results from this code.

>> import os
>> import sys

>> f1 = open('hmd4.csv')   
>> f2 = open('svm_words.txt')  

>> linecount = 0

>> for word1 in f1.read().split("."):
>>     for word2 in f2.read().split("\n"):
>>         if word1 in word2:
>>             linecount+=1 
>>             print (linecount)