Delete all files and directories from a micropython file-system (including .py files)

_nuke.py

# ***WARNING***
# Running this file  will delete all files and directories from the micropython device it's running on
# If you run  keep_this=False it will delete this file as well.

# see https://docs.micropython.org/en/latest/library/os.html for os function list

import os


def _delete_all(directory='.', keep_this=True):
    try:
        import machine
    except:
        # not a micropython board so exit gracefully
        print('Not a micro-python board! Leaving it well alone.')
        return
    for fi in os.ilistdir(directory):
        fn, ft = fi[0:2] # can be 3 or 4 items returned!
        if keep_this and fn == '_nuke.py':
            continue
        fp = '%s/%s' % (directory, fn)
        print('removing %s' % fp) 
        if ft == 0x8000:
            os.remove(fp)
        else:
            _delete_all(fp)
            os.rmdir(fp)


_delete_all()

Great script. Thanks a lot.
The only thing is that it also removes boot.py, which is probably not desirable.
I have adjusted the script a bit to remove all the files from the board except boot.py:

import os


try:
    import machine
except ImportError:
    print('This script can only be run on a MicroPython device')
    exit(1)


def delete_all_files_and_directories(directory):
    for file_info in os.ilistdir(directory):
        file_name, file_type = file_info[0:2]
        if file_name == 'boot.py':
            continue
        file_full_name = f"{directory}/{file_name}"
        print(f"Remove {file_full_name}")
        if file_type == 0x8000: # file
            os.remove(file_full_name)
        else:
            delete_all_files_and_directories(file_full_name)
            os.rmdir(file_full_name)


delete_all_files_and_directories("/")