On Sat, 2014-02-01 at 07:56 +0100, Christian Moe wrote: > > You should only use "return" like that in a python code block when you > > have ":results value". > > To expand briefly on that (since this can be perplexing): > > The need to use `return' at all when returning the value is a special > quirk of Python code blocks, and does not apply to (any?) other languages. > > As explained on Worg, with `:results value' (the default), > > "Internally, the value is obtained by wrapping the code in a function > definition in the external language, and evaluating that > function. Therefore, code should be written as if it were the body of > such a function. In particular, note that Python does not automatically > return a value from a function unless a return statement is present, and > so a ‘return’ statement will usually be required in Python." > > http://orgmode.org/manual/Results-of-evaluation.html > > So when using `:results output', using `return' causes an error > because there is no function to return anything from. > > Yours, > Christian
Thank you Christian for the detailed explanation. It is indeed perplexing at first! Regards, Greg
