by: Felix Wiemann |
last post by:
Sometimes (but not always) the __new__ method of one of my classes
returns an *existing* instance of the class. However, when it does
that, the __init__ method of the existing instance is called...
|
by: could ildg |
last post by:
As there is already __init__, why need a __new__?
What can __new__ give us while __init__ can't?
In what situations we should use __new__?
And in what situations we must use __new__?
Can __new__...
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by: James Stroud |
last post by:
Hello All,
I'm running 2.3.4
I was reading the documentation for classes & types
http://www.python.org/2.2.3/descrintro.html
And stumbled on this paragraph:
"""
__new__ must return an...
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by: Ken Schutte |
last post by:
Hi,
I'm been trying to create some custom classes derived from some of
python's built-in types, like int and list, etc. I've run into some
trouble, which I could explain with a couple simple...
|
by: Daniel Klein |
last post by:
I've have a program that is using both of the methods below (in
different classes of course) for initializing the class. The example
below shows a class with the 2 methods with one commented out.
...
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by: Paulo da Silva |
last post by:
Sorry to put here too many questions about __init__ __new__
stuff but I always found a new problem when using them.
I have searched for simple __new__ docs on how to do the
basic things but find...
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by: Frank Benkstein |
last post by:
Hi,
the behaviour I always observed when creating instances by calling the
class A is that '__init__' is always only called when the object
returned by A.__new__ is an instance of A. This can be...
|
by: Sandra-24 |
last post by:
Ok here's the problem, I'm modifying a 3rd party library (boto) to
have more specific exceptions. I want to change S3ResponseError into
about 30 more specific errors. Preferably I want to do this...
|
by: Steven D'Aprano |
last post by:
When you call a new-style class, the __new__ method is called with the
user-supplied arguments, followed by the __init__ method with the same
arguments.
I would like to modify the arguments...
|
by: Torsten Mohr |
last post by:
Hi,
i have some questions related to new style classes, they look
quite useful but i wonder if somebody can give me an example
on constructors using __new__ and on using __init__ ?
I just see...
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by: taylorcarr |
last post by:
A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...
|
by: ryjfgjl |
last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
|
by: ryjfgjl |
last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
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by: Sonnysonu |
last post by:
This is the data of csv file
1 2 3
1 2 3
1 2 3
1 2 3
2 3
2 3
3
the lengths should be different i have to store the data by column-wise with in the specific length.
suppose the i have to...
|
by: Hystou |
last post by:
There are some requirements for setting up RAID:
1. The motherboard and BIOS support RAID configuration.
2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers,...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
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