Python function that similar to bash find command

This can be done with the recursive glob provided by pathlib:

import pathlib
for p in pathlib.Path(".").rglob("*.png"):
    print(p)

The package provides useful features for renaming files, too.

For reference:

• https://docs.python.org/3/library/pathlib.html#pathlib.Path.glob
• https://docs.python.org/3/library/pathlib.html#pathlib.Path.rglob
• https://docs.python.org/3/library/pathlib.html#pathlib.Path.rename
• https://docs.python.org/3/library/pathlib.html#pathlib.Path.replace
• https://docs.python.org/3/library/pathlib.html#pathlib.PurePath.with_stem

For Python 2 os.walk could be used to traverse the directory tree.

Example:

import os

for dpath, dnames, fnames in os.walk("."):
  for i, fname in enumerate([os.path.join(dpath, fname) for fname in fnames]):
    if fname.endswith(".png"):
      #os.rename(fname, os.path.join(dpath, "%04d.png" % i))
      print "mv %s %s" % (fname, os.path.join(dpath, "%04d.png" % i))

Check out genfind.py from David M. Beazley.

# genfind.py
#
# A function that generates files that match a given filename pattern

import os
import fnmatch

def gen_find(filepat,top):
    for path, dirlist, filelist in os.walk(top):
        for name in fnmatch.filter(filelist,filepat):
            yield os.path.join(path,name)

# Example use

if __name__ == '__main__':
    lognames = gen_find("access-log*","www")
    for name in lognames:
        print name

These days, pathlib is a convenient option.