Added a fflush(stdout) after each printf and, as I expected....still
only the first 2 prints.
On Fri, Mar 25, 2011 at 1:47 PM, MRAB <pyt...@mrabarnett.plus.com> wrote:
> On 25/03/2011 17:37, Eric Frederich wrote:
>>
>> So.... I found that if I type ctrl-d then the other lines will print.
>>
>> It must be a bug then that the exit() function doesn't do the same thing.
>> The documentation says "The return value will be the integer passed to
>> the sys.exit() function" but clearly nothing is returned since the
>> call to Py_Main exits rather than returning (even when calling
>> sys.exit instead of just exit).
>>
>> In the mean time is there a way to redefine the exit function in
>> Python to do the same behavior as "ctrl-d?"
>> I realize that in doing that (if its even possible) still won't
>> provide a way to pass a value back from the interpreter via sys.exit.
>>
> You could flush stdout after each print or turn off buffering on stdout
> with:
>
> setvbuf(stdout, NULL, _IONBF, 0);
>
>> Thanks,
>> ~Eric
>>
>>
>>
>> On Fri, Mar 25, 2011 at 12:02 PM, Eric Frederich
>> <eric.freder...@gmail.com> wrote:
>>>
>>> I am able to embed the interactive Python interpreter in my C program
>>> except that when the interpreter exits, my entire program exits.
>>>
>>> #include<stdio.h>
>>> #include<Python.h>
>>>
>>> int main(int argc, char *argv[]){
>>> printf("line %d\n", __LINE__);
>>> Py_Initialize();
>>> printf("line %d\n", __LINE__);
>>> Py_Main(argc, argv);
>>> printf("line %d\n", __LINE__);
>>> Py_Finalize();
>>> printf("line %d\n", __LINE__);
>>> return 0;
>>> }
>>>
>>> When I run the resulting binary I get the following....
>>>
>>> $ ./embedded_python
>>> line 5
>>> line 7
>>> Python 2.7.1 (r271:86832, Mar 25 2011, 11:56:07)
>>> [GCC 4.1.2 20080704 (Red Hat 4.1.2-48)] on linux2
>>> Type "help", "copyright", "credits" or "license" for more information.
>>>>>>
>>>>>> print 'hi'
>>>
>>> hi
>>>>>>
>>>>>> exit()
>>>
>>>
>>> I never see line 9 or 11 printed.
>>> I need to embed python in an application that needs to do some cleanup
>>> at the end so I need that code to execute.
>>> What am I doing wrong?
>>>
>>> Is there something else I should call besides "exit()" from within the
>>> interpreter?
>>> Is there something other than Py_Main that I should be calling?
>>>
>>> Thanks,
>>> ~Eric
>>>
>
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