python 拷贝特定后缀名文件,并保留原始目录结构的实例

#!/usr/bin/python
# -*- coding: UTF-8 -*- 
import os
import shutil
def cp_tree_ext(exts,src,dest):
  """
  Rebuild the director tree like src below dest and copy all files like XXX.exts to dest 
  exts:exetens seperate by blank like "jpg png gif"
  """
  fp={}
  extss=exts.lower().split()
  for dn,dns,fns in os.walk(src):
    for fl in fns:
      if os.path.splitext(fl.lower())[1][1:] in extss:
        if dn not in fp.keys():
          fp[dn]=[]
        fp[dn].append(fl)
  for k,v in fp.items():
      relativepath=k[len(src)+1:]
      newpath=os.path.join(dest,relativepath)
      for f in v:
        oldfile=os.path.join(k,f)
        print("拷贝 ["+oldfile+"] 至 ["+newpath+"]")
        if not os.path.exists(newpath):
          os.makedirs(newpath)
        shutil.copy(oldfile,newpath)
#用法如下：
#
#cp_tree_ext(exts,src,dest)
#
#exts:以空格分隔的字符串，可多个拓展名，如"bat txt"
#src:原目录
#dest:目标目录，如果不存在，则建立
cp_tree_ext('doc docx','/home/lincoln/python/copy/source','/home/lincoln/python/copy/target')