Add the "Org Babel Ackermann Python test" section

README.org

@@ -5043,6 +5043,38 @@ ruff "$@" | cat
 # End:
 #+end_src
 
+*** Org Babel Ackermann Python test
+:PROPERTIES:
+:CUSTOM_ID: sec:obap-test
+:END:
+
+#+caption[Org Babel Ackermann Python test]:
+#+caption: Org Babel Ackermann Python test.
+#+name: lst:obap-test
+#+header: :wrap "src text -n"
+#+begin_src python -n :eval never-export :exports both :session
+# https://rosettacode.org/wiki/Ackermann_function#Python
+# https://www.youtube.com/watch?v=i7sm9dzFtEI
+
+def ack(M, N):
+    if M == 0:
+        return N + 1
+    elif N == 0:
+        return ack(M - 1, 1)
+    else:
+        return ack(M - 1, ack(M, N - 1))
+
+ack(3, 3)
+#+end_src
+
+#+caption[Org Babel Ackermann Python test result]:
+#+caption: Org Babel Ackermann Python test result.
+#+name: lst:obap-test-result
+#+RESULTS: lst:obap-test
+#+begin_src text -n
+61
+#+end_src
+
 *** [[https://pip.pypa.io/en/stable/][Package Installer for Python]]
 :PROPERTIES:
 :CUSTOM_ID: sec:pip-python