On 2016-11-25 01:24, Fabrice Popineau wrote: > The python shell name is not passed to any underlying shell. > It is used to create a process, so it must not be quoted in anyway. Are you sure? Looking at the code, I see this: (python-shell-make-comint (or cmd (python-shell-calculate-command)) …) And python-shell-make-comint does this: (split-string-and-unquote cmd) (ok, this is weird). But still, if the command is "C:\Program Files\Python\python.exe", then we *do* need the shell quoting, right? Clément.