[Tutor] How to have the name of a function inside the code of this function?

[Dave Angel]

On 04/06/2012 03:19 PM, Karim wrote:
> Le 06/04/2012 19:31, Alan Gauld a écrit :
>> On 06/04/12 09:47, Karim wrote:
>>
>>> If you have any idea to get the caller name inside the caller.
>>
>>
>> Its not normally very helpful since in Python the same function can
>> have many names:
>>
>> def F(x):
>>    return x*x
>>
>> a = F
>> b = F
>> c - lambda y: F(y)
>>
>> print F(1), a(2), b(3), c(4)
>>
>> Now, why would knowing whether the caller used F,a or b
>> to call the same function object help? And what do you
>> do in the case of c()? Do you return 'c' or 'F'?
>>
>> Maybe you could use it to tell you the context from
>> which they were calling? But in that case there are
>> usually better, more reliable, techniques
>>  - like examining the stackframe.
>>
>> HTH,
>
> Thanks Steven, Moduok and Steven for all your answers!
>
> The reason is simple I wanted to optimize some code using pyuno for
> openoffice.org doc generation I have several methods to set
> text with "Heading 1", ... "Heading <N>" title style:
>
> def title(self, text='', style="Heading 1"):
>      self._cursor_text.setPropertyValue('ParaStyleName', style)
>      self.add_text(text)
>
> def title1(self, text=''):
>      self.title(text=text)
>
> def title2(self, text=''):
>      self.title(text='', style="Heading 2")
>
> ...
>
> def title9(self, text=''):
>      self.title(text='', style="Heading 9")
>
> ---------------------------------------------------------------------------------
>
>
> I just wanted to improve a little by doing something like that (pseudo
> code):
>
> def title9(self, text=''):
>      self.title(text='', style="Heading " + <func_name>.split()[1])
>
>
> In short the number in the funtion name is the number of the title
> depth in the document.
> There is no big deal if Iit's not feasible;
>
> Cheers
> Karim
>
>
>

Those are methods, not functions.  So if you have a bunch of methods,
differing only in the numeric suffix their names have, and one of the
parameters to a method they each call, there's probably a simpler way.

First, you could create function objects (using approaches like
partial), turn them into methods, and attach them to a class with
generated names (somebody else will have to help you do it;  I just am
pretty sure it's possible)

Second, ifyou can control the code which will be calling these methods,
you could just have that code parameterize things a little differently. 
For example, instead of calling

   obj.title9("my text")

it might call
    obj.title(9, "my text")

where title() is a pretty simple, single method.





-- 

DaveA