Python生成文件的MD5和sha1

生成文件的MD5和sha1   

#coding=UTF-8
 
def fil_changefileext(filename,extname=''):
    # FIL ChangeFileExt 改变文件扩展名
    # filename    输入的文件路径名
    # extname=''  要更改分扩展名，如 .txt
    import os
    try:
        if extname[0]<>&#39;.&#39;:
            extname=&#39;.&#39;+extname
    except:
        extname=&#39;&#39;
    if os.path.splitext(filename)[1]==&#39;&#39;:
        uouttxt=filename+&#39;.&#39;+extname
    elif os.path.splitext(filename)[1]==&#39;.&#39;:
        uouttxt=filename+extname    
    else:
        uouttxt=filename[:0-len(os.path.splitext(filename)[1])]+extname
    return uouttxt
 
def fil_str2file(fstr,filename):
    # FIL STR2File 把字符串保存到文件 
    try:
        outfile=open(filename,&#39;w&#39;)
        outfile.writelines(fstr)
        outfile.close()
        return True   
    except:
        return False
     
#系统主程序开始
#-------------------------------------------------------
if __name__ == &#39;__main__&#39;:    
    import os,sys,math
    # if len(sys.argv)==1:sys.argv.append(r&#39;c:\FreeNAS-8.0.4-RELEASE-x64.iso&#39;)
    if len(sys.argv)>1:
        filepathname=sys.argv[1]
        if os.path.isfile(filepathname) :
            fmaxs = os.path.getsize(filepathname)+0.00
            fpos = 0.00
            ppos=0 
            pmax=50
            pjy=0         
            fmd5=fil_changefileext(filepathname,&#39;.md5&#39;)
            fsha1=fil_changefileext(filepathname,&#39;.sha&#39;)
            ffm=os.path.basename(filepathname)            
            #开始处理
            print &#39;Program Runing "&#39;+filepathname+&#39;" ...&#39;
            import hashlib
            try:
                umd5str = hashlib.md5()
                usha1str = hashlib.sha1()
                xfilepathname=unicode(filepathname,&#39;utf8&#39;)
                #需要使用二进制格式读取文件内容
                ufile = file(xfilepathname,&#39;rb&#39;)
                while True:
                    datas = ufile.read(1024*512)
                    if not datas: break
                    umd5str.update( datas )
                    usha1str.update( datas )
                    fpos=fpos+1024*512
                    ppos=int(math.floor(fpos / fmaxs * 50))
                    pposbfh=int(math.floor(fpos / fmaxs * 100))
                    #打印进度条
                    if pjy<>ppos: print &#39;[&#39;+&#39;*&#39;*ppos +&#39;=&#39;*(pmax-ppos)+&#39;] &#39;+str(pposbfh) +&#39;%&#39;
                    #打印进度问题未解决，不知道print函数怎么退回到行首覆盖输出，不换行我倒是知道，加个“,”  
                    pjy=ppos 
                uoutstrmd5=str(umd5str.hexdigest())
                uoutstrsha1=str(usha1str.hexdigest())
                ufile.close()
                print &#39;&#39;
                fil_str2file(uoutstrmd5+&#39; *&#39;+ffm+&#39;\n&#39;,fmd5)
                fil_str2file(uoutstrsha1+&#39; *&#39;+ffm+&#39;\n&#39;,fsha1)
                print &#39;Task is completed !&#39; + r&#39; [ XingHe Studio File to MD5 and SHA1 ]&#39;               
            except:        
                print &#39;Error !&#39; + r&#39; [ XingHe Studio File to MD5 and SHA1 ]&#39;
        else:
            print &#39;File "&#39;+filepathname+&#39;" not exist!&#39;+ r&#39; [ XingHe Studio File to MD5 and SHA1 ]&#39;
    else:
        print  r&#39; [ XingHe Studio File to MD5 and SHA1 ]&#39;