使用Python生成文件的MD5和sha1

1. [代码]生成文件的MD5和sha1 

#coding=UTF-8
# www.iplaypy.com python
# XingHe Studio File to MD5 and SHA1def 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 .txtimport ostry:if extname[0]<>'.':extname='.'+extnameexcept:extname=''if os.path.splitext(filename)[1]=='':uouttxt=filename+'.'+extnameelif os.path.splitext(filename)[1]=='.':uouttxt=filename+extname    else:uouttxt=filename[:0-len(os.path.splitext(filename)[1])]+extnamereturn uouttxtdef 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)+0.00fpos = 0.00ppos=0 pmax=50pjy=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 hashlibtry: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: breakumd5str.update( datas )usha1str.update( datas )fpos=fpos+1024*512ppos=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 ]'