Hello,
Is there a way I can, for debugging, access the instance variable name from
within a class?
E.g:
Class X:
def debug(self):
print "My instance var is %s" % (some magic Python stuff)
So that:
>>>x = X()
x.debug()
My Instance var is x
( Without passing the name in like: x=X(name="x") )
Thx.
\d
Oct 29 '07
16  1374 
for humans:
Sweet. Thanks, I'll give it a go. It's only for debugging and will make life
easier.
\d
vzcbeg vafcrpg
>
qrs _svaq(senzr, bow):
sbe anzr, inyhr va senzr.s_ybpnyf. vgrevgrzf():
vs inyhr vf bow:
erghea anzr
sbe anzr, inyhr va senzr.s_tybonyf .vgrevgrzf():
vs inyhr vf bow:
erghea anzr
envfr XrlReebe("Bowrp g abg sbhaq va senzr tybonyf be ybpnyf")
pynff K:
qrs qroht(frys):
cevag ("Pnyyre fgberf zr va %f (nzbat bgure cbffvoyr cynprf)"
% _svaq(vafcrpg.p heeragsenzr(1), frys))
Now that's taking i18n too far. Klingon is not a widely understood
language :D
\d
While Java's variable declarations bear a superficial (syntactical)
similarity to C, their semantics is in fact equivalent to the
object-reference semantics we know in Python.
I come from Z80A/GWBASIC/VB and a little C, I would describe a Python
variable as a pointer - in that it contains the address of something.
What that "something" is, is a little fuzzy. Right now I imagine it's to a
kind of structure which has meta info about the object as well as it's
actual address.
How far off would that be?
\d
En Tue, 30 Oct 2007 02:51:39 -0300, Donn Ingle <do********@gma il.com>
escribió:
>While Java's variable declarations bear a superficial (syntactical)
similarity to C, their semantics is in fact equivalent to the
object-reference semantics we know in Python.
I come from Z80A/GWBASIC/VB and a little C, I would describe a Python
variable as a pointer - in that it contains the address of something.
What that "something" is, is a little fuzzy. Right now I imagine it's to
a
kind of structure which has meta info about the object as well as it's
actual address.
How far off would that be?
Almost true. A Python variable is a name inside a namespace, pointing to a
Python object. Many names may point to the same object, of course.
An object (in CPython) is a structure containing a reference count,
followed by a pointer to the object's type, followed by the object
contents itself. The object contents may as simple as a single value (e.g.
int or float objects) or rather complex (like the frame object which
contains about 18 other values, including many pointers to other
structures and arrays).
The object's type would be what you call the meta info, and contains the
type name, many pointers to functions (implementing the type methods) and
some flags describing the type behavior.
--
Gabriel Genellina
Donn Ingle a écrit :
>>vzcbeg vafcrpg
qrs _svaq(senzr, bow):
sbe anzr, inyhr va senzr.s_ybpnyf. vgrevgrzf():
vs inyhr vf bow:
erghea anzr
sbe anzr, inyhr va senzr.s_tybonyf .vgrevgrzf():
vs inyhr vf bow:
erghea anzr
envfr XrlReebe("Bowrp g abg sbhaq va senzr tybonyf be ybpnyf")
pynff K:
qrs qroht(frys):
cevag ("Pnyyre fgberf zr va %f (nzbat bgure cbffvoyr cynprf)"
% _svaq(vafcrpg.p heeragsenzr(1), frys))
Now that's taking i18n too far. Klingon is not a widely understood
language :D
s/i18n/rot13/ !-)
Hrvoje Niksic a écrit :
Bruno Desthuilliers <br************ ********@wtf.we bsiteburo.oops. com>
writes:
>>>While Java's variable declarations bear a superficial (syntactical)
similarity to C, their semantics is in fact equivalent to the
object-reference semantics we know in Python. They implicitly refer
to objects allocated on the heap and, just like in Python, the same
object can be referenced by multiple variables.
You're talking about reference types here - not primitive types. And
even then, from what I remember (not having done any Java these last
4 years at least), Java's reference types are much closer to C++
references than to Python.
Feel free to look it up; I believe you will find the semantics of
assignment, parameter-passing, etc., exactly the same as in Python.
I'll do - while perhaps not in a near future !-) - and keep you informed.
On Oct 28, 6:01 am, Donn Ingle <donn.in...@gma il.comwrote:
Is there a way I can, for debugging, access the instance variable name from
within a class?
Shouldn't this be in a FAQ somewhere? It's the second time (at least!)
it comes up this week.
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