import os
from os import listdir
from os.path import isfile, join

mypath=print(os.getcwd()) # prints the current working directory

all_files = [f for f in listdir(mypath) if isfile(join(mypath, f))]
print(all_files) # prints the list of files in a folder

here are the errors?
i need help….why i have the following error?

File c:usersptumidocumentsiamachinelearningcoursdatacours1lm.py:25
all_files = [f for f in listdir(mypath) if isfile(join(mypath, f))]

File c:usersptumidocumentsiamachinelearningcoursdatacours1lm.py:25 in
all_files = [f for f in listdir(mypath) if isfile(join(mypath, f))]

File :108 in join

TypeError: expected str, bytes or os.PathLike object, not NoneType

i try to print the content of a folder

But at the following instruction i have an error :
all_files = [f for f in listdir(mypath) if isfile(join(str(mypath), f))]

i have this error:
all_files = [f for f in listdir(mypath) if isfile(join(mypath, f))]

File :108 in join

TypeError: expected str, bytes or os.PathLike object, not NoneType