> > Additionally, If I'm making things much more complicated than they
> > need to be, let me know.
>
> You are. There are ways to achieve what you want, but it requires a
> lot more setup and discipline. The simplest way is probably to have
> a _equal_fields() method that subclasses override, r
On 2/18/2013 2:51 PM, Jean-Michel Pichavant wrote:
Greetings,
I opened something like a month ago a thread about hash functions and how I
could write classes which instances can be safely used as dictionary keys.
I though I had it but when I read back my code, I think I wrote yet another bug.
On 19 February 2013 06:51, Jean-Michel Pichavant wrote:
> Greetings,
>
> I opened something like a month ago a thread about hash functions and how
> I could write classes which instances can be safely used as dictionary keys.
> I though I had it but when I read back my code, I think I wrote yet
>
On Mon, Jun 20, 2011 at 6:42 PM, Spencer Pearson
wrote:
> I was recently trying to implement a dict-like object which would do
> some fancy stuff when it was modified, and found that overriding the
> __setitem__ method of an instance did not act the way I expected. The
> help documentation (from h
Spencer Pearson wrote:
I was recently trying to implement a dict-like object which would do
some fancy stuff when it was modified, and found that overriding the
__setitem__ method of an instance did not act the way I expected.
The __magic__ methods are only looked up on the class, never the in
On Fri, 02 Nov 2007 19:36:05 -0700, Scott Dial wrote:
> I have started working on a new project using ZSI and perhaps one can
> argue this is a bug in ZSI, but I found it odd. The ZSI dispatcher needs
> to catch all exceptions and pass that over to the client; in doing so,
> it passes along the na
Quenton,
What kind of instances do you want to create? An instance has to be an
instance of something. You mention creating instances "of a method",
what do you mean by that?
Anyway, assuming you are new to Python here is a basic intro about
objects and classes:
Think of a class as a blueprint an
Quenton Bonds wrote:
> Hello
> I am trying to understand the abilities and limitation of creating an
> instance. First I will give you my understanding then please steer me
> in the right direction.
>
Wow, you've got it nearly completely comprehensively backwards.
> Abiities
> 1. The two ways t
Quenton Bonds wrote:
> Hello
> I am trying to understand the abilities and limitation of creating an
> instance. First I will give you my understanding then please steer me
> in the right direction.
>
> Abiities
> 1. The two ways to create an instance is def method(self) &
> __int__(self, other,
Quenton Bonds wrote:
> I am trying to understand the abilities and limitation of creating an
> instance. First I will give you my understanding then please steer me
> in the right direction.
>
> Abiities
> 1. The two ways to create an instance is def method(self) &
> __int__(self, other, ins
Mr.Rech wrote:
> and so on. The problem I'm worried about is that an unaware user may
> create an instance of "A" supposing that it has any real use, while it
> is only a sort of prototype. However, I can't see (from my limited
> point of view) any other way to rearrange things and still get a
> s
On Fri, Dec 02, 2005 at 10:43:56AM +0100, bruno at modulix wrote:
> Inyeol Lee wrote:
> (snip)
>
> class A(object):
> ... def __init__(self, foo):
> ... if self.__class__ is A:
> ... raise TypeError("A is base class.")
>
>
> s/TypeError/NotI
I see your point. Looking again at my metaclass implementation and
comparing it with your abstract class + inheritance approach it turns
out that the latter is definetively more straightforward, easier to
maintain and all in all more pythonic.
Sorry, but being an OOP newbie put me in the position
Mr.Rech wrote:
> Thanks for your suggestions. They are very usefull and indeed bypass my
> problem. However, I've found a (perhaps) more elegant way to get the
> same result using metaclasses.
(snip code)
>
> I know metaclasses are a complete different beast, anyway I find this
> approach more
Mr.Rech wrote:
> Thanks for your suggestions. They are very usefull and indeed bypass my
> problem. However, I've found a (perhaps) more elegant way to get the
> same result using metaclasses. My idea is to define my classes as
> follows:
>
class meta_A(type):
> def __new__(cls, cl
Thanks for your suggestions. They are very usefull and indeed bypass my
problem. However, I've found a (perhaps) more elegant way to get the
same result using metaclasses. My idea is to define my classes as
follows:
>>> class meta_A(type):
def __new__(cls, classname, bases, classdict):
Inyeol Lee wrote:
(snip)
class A(object):
... def __init__(self, foo):
... if self.__class__ is A:
... raise TypeError("A is base class.")
s/TypeError/NotImplementedError/
s/base class/abstract class/
--
bruno desthuilliers
python -c "pri
Mr.Rech wrote:
> Suppose I have a bunch of classes that represent slightly (but
> conceptually) different object. The instances of each class must behave
> in very similar manner, so that I've created a common class ancestor
> (let say A) that define a lot of special method (such as __getattr__,
>
"Mr.Rech" <[EMAIL PROTECTED]> writes:
> Suppose I have a bunch of classes that represent slightly (but
> conceptually) different object. The instances of each class must behave
> in very similar manner, so that I've created a common class ancestor
> (let say A) that define a lot of special method (
On Thu, Dec 01, 2005 at 03:51:05PM -0800, Mr.Rech wrote:
[...]
> Suppose I have a bunch of classes that represent slightly (but
> conceptually) different object. The instances of each class must behave
> in very similar manner, so that I've created a common class ancestor
> (let say A) that define
Steven Bethard wrote:
Open Issues
===
What should the type be named? Some suggestions include 'Bunch',
'Record' and 'Struct'.
Add 'namespace' to the list of name suggestions :)
Cheers,
Nick.
The name came up in some thread a few weeks back. . .
--
Nick Coghlan | [EMAIL PROTECTED] |
Krzysztof Stachlewski wrote:
I tried to run the following piece of code:
Python 2.3.4 (#53, May 25 2004, 21:17:02) [MSC v.1200 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
o = object()
o.a = 5
Traceback (most recent call last):
File "", line 1, i
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