get all the files in the path in a list?

[snippsat]

what do I need to change \ do ?

Not all system take pathlib object,then need to convert to normal string(str object).
Use fspath for this as is made just for this task.

from pathlib import Path
from os import fspath

dest = r'G:\div_code\all_files'
for path in Path(dest).rglob('*'):
    if path.is_file():
        print(fspath(path))

Use type() if you unsure what object used.

from pathlib import Path
from os import fspath

dest = r'G:\div_code\all_files'
for path in Path(dest).rglob('*'):
    if path.is_file():
        print(type(fspath(path)))

Output:
<class 'str'>
<class 'str'>
<class 'str'>
<class 'str'>