利用Python生成文件md5校验值函数的方法

[crazyant@localhost PythonMd5]$moresample_file

www.crazyant.net

www.51projob.com

[crazyant@localhost PythonMd5]$ md5sum sample_file > sample_file.md5file

[crazyant@localhost PythonMd5]$moresample_file.md5file

311d384505e3622ccf85d88930e2b0a0 sample_file

[crazyant@localhost PythonMd5]$ md5sum -c sample_file.md5file

sample_file: OK

# -*- encoding:utf-8 -*-

fromhashlibimportmd5

importos

defgenerate_file_md5value(fpath):

 '''以文件路径作为参数，返回对文件md5后的值

 '''

 m=md5()

 # 需要使用二进制格式读取文件内容

 a_file=open(fpath,'rb')

 m.update(a_file.read())

 a_file.close()

 returnm.hexdigest()

defgenerate_file_md5sumFile(fpath):

 fname=os.path.basename(fpath)

 fpath_md5="%s.md5"%fpath

 fout=open(fpath_md5,"w")

 fout.write("%s %s\n"%(generate_file_md5value(fpath), fname.strip()))

 print"generate success, fpath:%s"%fpath_md5

 fout.flush()

 fout.close()

if__name__=="__main__":

 fpath="/home/users/workbench/PythonMd5/sample_file"

 # 测试一：以文件路径作为参数，获得md5后的字符串

 printgenerate_file_md5value(fpath)

 # 测试二：生成和linux命令：md5sum同样结果的.md5文件

 generate_file_md5sumFile(fpath)

[crazyant@localhost PythonMd5]$ python generateMd5file.py

311d384505e3622ccf85d88930e2b0a0

generate success, fpath:/home/crazyant/workbench/PythonMd5/sample_file.md5

[crazyant@localhost PythonMd5]$ md5sum-c sample_file.md5

sample_file: OK