[Python-Dev] Draft PEP and reference implementation of a Python launcher for Windows

[Scott Dial]

On 3/19/2011 7:23 PM, Nick Coghlan wrote:
> On Sun, Mar 20, 2011 at 9:04 AM, "Martin v. Löwis" <martin at v.loewis.de> wrote:
>> Am 19.03.2011 23:51, schrieb Nick Coghlan:
>>> On Sun, Mar 20, 2011 at 4:49 AM, "Martin v. Löwis" <martin at v.loewis.de> wrote:
>>>> I, for example, will find issues with it if the implementation uses
>>>> CreateProcess at some point - the launcher should IMO run Python
>>>> directly, rather than creating a new process. This, in turn, will
>>>> probably mean that you cannot actually implement the PEP in Python.
>>>
>>> runpy performs basically that dance to implement
>>> _run_module_as_main(), so it's definitely possible.
>>
>> Does it also support loading a different interpreter version than the
>> one it is running?
> 
> Ouch, no. I guess you're right, any Python based solution will need to
> create a child process.

Why would that be true? Shouldn't this launcher just be a basic wrapper
that cobbles together the arguments for an eventual os.exec*() call?
What is there to do other than to exec the correct interpreter with (a
subset of?) the command-line arguments?

-- 
Scott Dial
scott at scottdial.com
scodial at cs.indiana.edu