How to use python listdir in org babel?

Question

While the command below returns filenames in the commandline, I somehow can't get the same result using org-babel:

#+BEGIN_SRC python :results output
import os
os.listdir(path='.')
#+END_SRC

#+RESULTS:
None

Altering the command e.g. using scandir nor the :results property (value,raw) helped

Answer 1

By using :results value and returning a value, the result will be a list:

#+begin_src python :results value
import os
return os.listdir(path='.')
#+end_src

#+RESULTS:
| python.org | foo.txt | bar.txt |

Returning the results as an org table, as above, makes the results easy to use as the input to other src blocks. But, if you want the result to be formatted like a python list, you can use :results value pp:

#+begin_src python :results value pp
import os
return os.listdir(path='.')
#+end_src

#+RESULTS:
: ['python.org', 'foo.txt', 'bar.txt']

or :results output and print the result:

#+begin_src python :results output
import os
print(os.listdir(path='.'))
#+end_src

#+RESULTS:
: ['python.org', 'foo.txt', 'bar.txt']