生成文件的MD5和sha1    

#coding=UTF-8  # XingHe Studio File to MD5 and SHA1  # 星河创作室(XingHeStudio.com)  # Create by Stream.Wang 2012-04-10  # Modify by Stream.Wang 2012-04-10    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]<>'.':              extname='.'+extname      except:          extname=''      if os.path.splitext(filename)[1]=='':          uouttxt=filename+'.'+extname      elif os.path.splitext(filename)[1]=='.':          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,'w')          outfile.writelines(fstr)          outfile.close()          return True          except:          return False        #系统主程序开始  #-------------------------------------------------------  if __name__ == '__main__':          import os,sys,math      # if len(sys.argv)==1:sys.argv.append(r'c:\FreeNAS-8.0.4-RELEASE-x64.iso')      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,'.md5')              fsha1=fil_changefileext(filepathname,'.sha')              ffm=os.path.basename(filepathname)                          #开始处理              print 'Program Runing "'+filepathname+'" ...'              import hashlib              try:                  umd5str = hashlib.md5()                  usha1str = hashlib.sha1()                  xfilepathname=unicode(filepathname,'utf8')                  #需要使用二进制格式读取文件内容                  ufile = file(xfilepathname,'rb')                  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 '['+'*'*ppos +'='*(pmax-ppos)+'] '+str(pposbfh) +'%'                      #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 ''                  fil_str2file(uoutstrmd5+' *'+ffm+'\n',fmd5)                  fil_str2file(uoutstrsha1+' *'+ffm+'\n',fsha1)                  print 'Task is completed !' + r' [ XingHe Studio File to MD5 and SHA1 ]'                              except:                          print 'Error !' + r' [ XingHe Studio File to MD5 and SHA1 ]'          else:              print 'File "'+filepathname+'" not exist!'+ r' [ XingHe Studio File to MD5 and SHA1 ]'      else:          print  r' [ XingHe Studio File to MD5 and SHA1 ]'