[program-l] Re: quick python question
- From: Doug Lee <dgl@xxxxxxxx>
- To: program-l@xxxxxxxxxxxxx
- Date: Sun, 29 Mar 2009 14:07:39 -0400
Functions are first-class citizens in Python: If you have def
f(...), you can say things like myfunc = f, and myarray[2] = f, and
myfunc(f). Put another way, if f() calls function f, then f by
itself is like a function pointer to f's code.
On Sun, Mar 29, 2009 at 11:58:05AM -0600, Tyler Littlefield wrote:
> hello,
> I believe I got it working; I just wrote get/set methods for the
> variables, wihch I can eval. This allows me to control what gets changed
> via eval, as well.
> I have one more question; is there a way to do something like an array of
> function pointers in c++, or the equiv of a delegate in .net, so I can
> use hooks? The functions will have something like the following
> prototype:
> void hook(void* data)
> That's my c implamentation, but it would be similar.
>
> On another note, thanks for the help, both jamal and brandon. Haven't
> heard from you in forever, hows things going?
>
>
> Thanks,
> Tyler Littlefield
> Web: tysdomain.com
> email: tyler@xxxxxxxxxxxxx
> My programs don't have bugs, they're called randomly added features.
>
> ----- Original Message ----- From: "Jamal Mazrui" <empower@xxxxxxxxx>
> To: <program-l@xxxxxxxxxxxxx>
> Sent: Tuesday, March 24, 2009 9:08 AM
> Subject: [program-l] Re: quick python question
>
>
>> You can use the eval function to evaluate an expression, or in your
>> example, the exec statement to execute a statement (Python draws a
>> distinction between an expression and a statement). Note that use of
>> such techniques can risk security if there is a way for arbitrary code
>> to be injected from an external source.
>>
>> Jamal
>>
>> On Mon, 23 Mar 2009, Tyler
>> Littlefield wrote:
>>
>>> Date: Mon, 23 Mar 2009 21:57:49 -0600
>>> From: Tyler Littlefield <tyler@xxxxxxxxxxxxx>
>>> Reply-To: program-l@xxxxxxxxxxxxx
>>> To: program-l@xxxxxxxxxxxxx
>>> Subject: [program-l] quick python question
>>>
>>> Hello list,
>>> I'm working on a mud that uses python as it's scripting language, and
>>> had a quick question.
>>> Is it possible to evaluate python code?
>>> Like, from within the mud I'd like to do something like:
>>> eval (find_char("azar")).level=100
>>> and have azar's level be set to 100.
>>>
>>>
>>> Thanks,
>>> Tyler Littlefield
>>> Web: tysdomain.com
>>> email: tyler@xxxxxxxxxxxxx
>>> My programs don't have bugs, they're called randomly added features.
>>>
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>
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--
Doug Lee dgl@xxxxxxxx http://www.dlee.org
SSB BART Group doug.lee@xxxxxxxxxxxxxxxx http://www.ssbbartgroup.com
The very smart may feel they have nothing to learn from anyone;
The very wise will find something to learn from everyone. (7/14/01)
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