reticulate::py_capture_output(type = NULL)

[tyner]

One lesser known (but fully documented) feature of match.arg is it regards arg = NULL as equivalent to the first element of choices:

> match.arg(arg = NULL, choices = c("stdout", "stderr"))
[1] "stdout"

As a result, these two calls yield identical output:

reticulate::py_capture_output(expr, type = NULL)
reticulate::py_capture_output(expr, type = "stdout")

If this is the intended behavior of py_capture_output, it might be nice to document that on the help page.

If it is not the intended behavior, then perhaps py_capture_output could throw an error when type = NULL.

Thank you for considering.