python备份文件的脚本

实际效果：假设给定目录"/media/data/programmer/project/python" ，备份路径"/home/diegoyun/backup/“ ， 则会将python目录下的文件按照全路经备份到备份路径下，形如：

/home/diegoyun/backup/yyyymmddHHMMSS/python/xxx/yyy/zzz.....

import os 
import shutil 
import datetime 

def mainLogic(): 
    #add dirs you want to copy 
    backdir="I:\\backup"     
    copydirs=[] 
    copydirs.append("D:\\programmer") 
    copydirs.append("D:\\diegoyun")     

    print "Copying files  ===================" 
    start=datetime.datetime.now() 

    #gen a data folder for backup 
    backdir=os.path.join(backdir,start.strftime("%Y-%m-%d")) 
    #print "backdir is:"+backdir 

     
    kc=0 
    for d in copydirs: 
        kc=kc+copyFiles(d,backdir) 

    end=datetime.datetime.now() 
    print "Finished! ===================" 
    print "Total files : " + str(kc)  
    print "Elapsed time : " + str((end-start).seconds)+" seconds" 

def copyFiles(copydir,backdir): 
    prefix=getPathPrefix(copydir) 
    #print "prefix is:"+prefix     

    i=0 
    for dirpath,dirnames,filenames in os.walk(copydir): 
        for name in filenames: 
            oldpath=os.path.join(dirpath,name) 
            newpath=omitPrefix(dirpath,prefix) 
            print "backdir is:"+backdir             
            newpath=os.path.join(backdir,newpath) 
            print "newpath is:"+newpath 

            if os.path.exists(newpath)!=True: 
                os.makedirs(newpath)   
            newpath=os.path.join(newpath,name) 
            print "From:"+oldpath+" to:"+newpath 
            shutil.copyfile(oldpath,newpath) 
            i=i+1 
    return i     

def getPathPrefix(fullpath): 
    #Giving /media/data/programmer/project/ , get the prefix 
    #/media/data/programmer/ 
    l=fullpath.split(os.path.sep) 
    #print str(l[-1]=="")     
    if l[-1]=="": 
        tmp=l[-2] 
    else: 
        tmp=l[-1] 
    return fullpath[0:len(fullpath)-len(tmp)-1] 

def omitPrefix(fullpath,prefix): 
    #Giving /media/data/programmer/project/python/tutotial/file/test.py , 
    #and prefix is Giving /media/data/programmer/project/, 
    #return path as python/tutotial/file/test.py 
    return fullpath[len(prefix)+1:] 

mainLogic()