Hi, Is it possible to add custom arguments to source code evaluation in org babel? For example, if the source code block is: #+BEGIN_SRC python # valid comment 1 print("Hi there!") # valid comment 2 print("# Invalid comment! #UsefulForHashtags!") print ("Space is fine here!") #+END_SRC The general C-c C-c will evaluate it using the python interpreter. Hence the result: #+RESULTS: : Hi there! : # Invalid comment! #UsefulForHashtags! : Space is fine here! However, I would like to pass '-m trace --trace' arguments to the interpreter, so that the resulting text capture is basically an output of the following command: > python -m trace --trace notes.py --- modulename: notes, funcname: notes.py(2): print("Hi there!") # valid comment 2 Hi there! notes.py(3): print("# Invalid comment! #UsefulForHashtags!") # Invalid comment! #UsefulForHashtags! notes.py(4): print ("Space is fine here!") Space is fine here! --- modulename: trace, funcname: _unsettrace trace.py(77): sys.settrace(None) So far, I know I can do this via #+call syntax and a custom shell script. However, that looks like an overkill for passing simple arguments to the interpreter. I have tried :cmdline and :args "-m trace --trace", and neither seem to work. Any ideas? Dushyant