How to copy files from subfolders into one folder

[silfer]

Hi
I want to copy tif files contained in subfolders of folder "U:\\collections\\2019_input\\" in one separated output folder "U:\\collections\\2019_output\\" (no subfolders needed in the output).
My code :

input = "U:\\collections\\2019_input\\"
output = "U:\\collections\\2019_output\\"

for dirpath, dirnames, filenames in os.walk(input):
    for filename in filenames:
        if filename.endswith(".tif"):
            shutil.copy2(filename, output)

But it seems that shutil.copy2 command does not find the file to be copied.
Any idea?
Thanks !

[buran]

filename is just the name of the file, without path. You need to add path

import os
import shutil
src_path = "U:\\collections\\2019_input\\" # don't use input - it's builtin functiom
out_path = "U:\\collections\\2019_output\\"
 
for dirpath, dirnames, filenames in os.walk(in_path):
    for filename in filenames:
        if filename.endswith(".tif"):
            src = os.path.join(dir_path, filename)
            dest = os.path.join(out_path, filename)
            shutil.copy2(src, dest)

other way is to use glob

import os
import glob
import shutil
src_path = "U:\\collections\\2019_input\\" # don't use input - it's builtin functiom
out_path = "U:\\collections\\2019_output\\"
  
for filename in glob.glob(os.path.join('.', '*.*')):
    _, fname = os.path.split(filename)
    shutil.copy2(filename, os.path.join(dest_path, fname))

[silfer]

This is great, buran, thank you very much !

[DeaD_EyE]

You already know, I like the abstraction of pathlib.

import shutil
from pathlib import Path


src_path = Path("U:\\collections\\2019_input")
out_path = Path("U:\\collections\\2019_output")


for filename in src_path.rglob('*'):
    target_file = out_path / filename.name
    if target_file.exists():
        print('File', target_file, 'exists already. Skipping...')
        continue
    print(filename, target_file)
    # shutil.copy2(filename, target_file)

Code haven't been tested. You have to be careful, pathlib got some additions, which are not in older versions available.
I use Python 3.7.4.