Convert GNU find command to Python function

I want to convert this GNU command into a python function:

find folder/ 2>/dev/null > file.txt

The find will list all files and folders fr开发者_开发知识库om the directory recursively and write them to a file.

What I have now in Python is:

import os
project="/folder/path"
i=0
for (project, dirs, files) in os.walk(project):
   print project
   print files
   i += 1

But now I am trying to make the output exactly as find does.

import os
path = "folder"
for dirpath, dirnames, filenames in os.walk(path):
    print(dirpath)
    for filename in filenames:
        print(os.path.join(dirpath, filename))

Instead of print you can write to file.