....if I modify Jonathan's solution to default findAllNames=True,and
Massimo's to return the list (not just the first item)
I see they are not equivalent:
In [13]: getName(f._db)
Out[13]: ['db', '_7', '_10', '_']
In [14]: mName(f._db)
Out[14]: ['__', 'db', '_9', '_7', '_10', '___', 'f', None]
In [15]: mName(db)
Out[15]: ['db', '_9', '_7', '_10', '___', 'f', None]
In [16]: getName(db)
Out[16]: ['db', '_7', '_10']
Ignoring the "None" from Massimo's list (which could be removed), "f" in
this case is not a desireable part of the result set, as it is not pointing
to the same object referenced by "db" or "_7" (for example). For that
matter, _9 is not a desirable part of the result set either.
Clearly, these two are not equivalent solutions.
On Wed, Dec 17, 2008 at 10:52 AM, Yarko Tymciurak <yark...@gmail.com> wrote:
> Massimo''s has a small typo: two paren's after 'return((.....' and a
> closing paren...
> EIther of these "work" in that they both give me (for example):
>
> getName(db)
> '_5'
>
> getName(f._db)
> '_5'
>
> SO they are consistent references to some string, presumably with a
> correlation to the SQLStorage object...
>
> with this as my example:
>
> ydb.define_table('my_table',SQLField('my_field'))
> f=ydb.my_table.my_field
>
> and using Jonathan's solution, I see this:
>
> In [23]: getName(f._db, findAllNames=True)
> Out[23]: ['_5', 'ydb', '_', '_22']
>
> In [24]: getName(ydb, findAllNames=True)
> Out[24]: ['__', '_5', 'ydb', '_22']
>
>
> As you can see, the variable name you use to reference a given object is
> somewhat arbitrary (it's just a reference), and "the name" (!) that you
> want is also arbitrary (that is, you could use ydb.my_table or _5.my_table
> equivalently; not "_" or "__" as they are transient).
>
> This begs the question: if you are writing code "live", you can use
> whatever string your heart desires (including picking the first one from
> Jonathan's output that doesn't start with '_'). Actually, maybe that's
> what you really want: a getName function that returns the first non-'_'
> name.
>
>
>
> So, Denes, how are you going to use these references to objects?
>
> I guess I'm not understanding something ...
>
> With interest,
> Yarko
>
>
> On Wed, Dec 17, 2008 at 9:58 AM, mdipierro <mdipie...@cs.depaul.edu>wrote:
>
>>
>> Here it is a little shorter
>>
>> def getName(obj): return ([k for k,v in globals().items() if v==obj]+
>> [None])[0]
>>
>> Massimo
>>
>> On Dec 17, 9:33 am, DenesL <denes1...@yahoo.ca> wrote:
>> > Thank you Jonathan, that's exactly it!.
>> > I knew it had to involve globals somehow.
>> >>
>>
>
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