Python实现文件的压缩及解压详解编程语言

当我们遇到大量小文件的传输时，一般会涉及到文件的压缩和解压，下面对zip的压缩解压直接上代码

压缩：

    def zip_dir(dirname,zipfilename):   
        """  
        | [email protected]: 压缩指定目录为zip文件  
        | [email protected]：dirname为指定的目录，zipfilename为压缩后的zip文件路径  
        | [email protected]：无  
        | [email protected]：  
        """   
        filelist = []   
        if os.path.isfile(dirname):   
            filelist.append(dirname)   
        else :   
            for root, dirs, files in os.walk(dirname):   
                for name in files:   
                    filelist.append(os.path.join(root, name))   
       
        zf = zipfile.ZipFile(zipfilename, "w", zipfile.zlib.DEFLATED)   
        for tar in filelist:   
            arcname = tar[len(dirname):]   
            #print arcname   
            zf.write(tar,arcname)   
        zf.close()  

解压缩：

    def unzip_file(zipfilename, unziptodir):   
        """  
        | [email protected]: 解压zip文件到指定目录  
        | [email protected]：zipfilename为zip文件路径，unziptodir为解压文件后的文件目录  
        | [email protected]：无  
        | [email protected]：  
        """   
        if not os.path.exists(unziptodir):   
            os.mkdir(unziptodir, 0777)   
        zfobj = zipfile.ZipFile(zipfilename)   
        for name in zfobj.namelist():   
            name = name.replace('//','/')   
       
            if name.endswith('/'):   
                p = os.path.join(unziptodir, name[:-1])   
                if os.path.exists(p):   
                    # 如果文件夹存在，就删除之：避免有新更新无法复制   
                    shutil.rmtree(p)   
                os.mkdir(p)   
            else:   
                ext_filename = os.path.join(unziptodir, name)   
                ext_dir= os.path.dirname(ext_filename)   
                if not os.path.exists(ext_dir):   
                    os.mkdir(ext_dir,0777)   
                outfile = open(ext_filename, 'wb')   
                outfile.write(zfobj.read(name))   
                outfile.close()