[R-gui] Converting RSPython objects and R-TclTk analogy

[James Wettenhall]

Hi Vaidotas,

Duncan may have answered your question already, but you should 
be aware of the .convert argument of the .Python() function.
Using .convert=FALSE in .Python() should help to avoid errors 
from RSPython like "Failing in conversion..."

An R-Tcl/Tk analogy is the following:
result <- tkmessageBox(message="Hello")

After clicking OK, result is an object of class "tclObj", and we 
can find its value ("ok") using tclvalue(result). 

So 
result <- tkmessageBox(message="Hello")
is similar to using .convert=FALSE in RSPython's .Python()

and
result <- tclvalue(tkmessgaeBox(message="Hello"))
is similar to using .convert=TRUE in RSPython's .Python()

Hope this helps,
James

P.S. I really should come up with a better "patch" to 
helpers.cpp than then one I mentioned before.  Rather than 
overwriting sysargv no matter what, I should only overwrite it 
if its Python value is NULL.