python判断两个文件是否相同

import hashlib

def gethash(f):

line=f.readline()

hash=hashlib.md5()

while(line):

hash.update(line)

line=f.readline()

return hash.hexdigest()

def ishashequal(f1,f2):

str1=gethash(f1)

str2=gethash(f2)

return str1==str2

if __name__ == '__main__':

f1=open("d:/2.iso","rb")

f2=open("e:/wenjian/1.iso","rb")

print ishashequal(f1,f2)

计算2个文件的md5值，大文件计算较慢

python对两个文本进行相同项筛选

import os

import os.path as osp

def filter(path):

file_path = osp.join(path, 'index.txt')

if osp.exists(file_path):

return file_path

index_file = open(file_path, 'a+')

if not os.path.isdir(path): #判断path是否为路径

return

for root, dirs, list in os.walk(path):

for i in list:

dir = os.path.join(root, i) #将分离的部分组成一个路径名

#if os.path.getsize(dir) < 60000: #获取文件大小

#os.remove(dir) #删除文件

print (i)

index_file.write(i+'\n')

index_file.close()

def compare(path):

file=osp.join(path, 'label.txt')

file_path = osp.join(path, 'index.txt')

with open(file_path, 'r') as file1:

with open(file, 'r') as file2:

same = set(file1).intersection(file2)

same.discard('\n')

with open('some_output_file.txt', 'w') as file_out:

for line in same:

file_out.write(line)

file_out.close()

filter(r'd:\desktop\jiaoben\ci')

compare(r'd:\desktop\jiaoben\ci')

总结

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