recursively list files in directory based on fileformat

from pathlib import Path

# recursively read in files, only works in python 3.5+
# works on linux & windows returns files w/ directory
def list_files_recursively(directory, fileformat):
    glob_path = Path(directory)
    file_list = [str(pp) for pp in glob_path.glob("**/*."+fileformat)]
    return file_list