Hi!
What's wrong with this way of subclassing?
from datetime import date
class MyDate(date):
def __init__(self,y ear,month=None, day=None):
if type(year) is str:
# The whole date is here as a string
year,month,day= map(int,string. split(year,'-'))
if year<100:
year+=2000
date.__init__(s elf,year,month, day)
When I do
d=MyDate("2007-3-15")
I got
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: function takes exactly 3 arguments (1 given)
Thanks for any help.
2  1229 
Miki escreveu:
Hello Paulo,
>What's wrong with this way of subclassing?
...
See http://sourceforge.net/tracker/index...70&atid=105470
HTH,
--
Miki <mi*********@gm ail.com>
http://pythonwise.blogspot.com
Thanks!
It works this way:
class MyDate(date):
def __new__(cls,yea r,month=None,da y=None):
if type(year) is str:
# The whole date is here as a string
year,month,day= map(int,string. split(year,'-'))
if year<100:
year+=2000
return date.__new__(cl s,year,month,da y) This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: Peter Olsen |
last post by:
I want to define a class "point" as a subclass of complex.
When I create an instance
sample = point(<arglist>)
I want "sample" to "be" a complex number, but with its real and
imaginary parts computed in point()'s __init__ function with their
values based on the arglist. I want to compute with point instances
as though they were native complex numbers, but I want to be able to
|
by: Brent |
last post by:
I'd like to subclass the built-in str type. For example:
--
class MyString(str):
def __init__(self, txt, data):
super(MyString,self).__init__(txt)
self.data = data
|
by: Pieter Linden |
last post by:
Hi,
This question refers sort of to Rebecca Riordan's article on Access
web about subclassing entities:
http://www.mvps.org/access/tables/tbl0013.htm
How practical is this? I am writing a database to track Computer
equipment/inventory as well as other devices. Computers, of course,
have software installed, so I want to keep track of that. I was
|
by: Alexander Wehrli |
last post by:
Hi,
I need to write a functionality to catch all Windows Messages from any
Window (like spy++ does). I thought that would be possible by subclassing the
window.
So I wrote a class that inherts from NativeWindow, Assigned a Handle from
another window and overrode the WndProc method.
BUT, I never catch any message EXCEPT if I assign the handle of my own
|
by: alex23 |
last post by:
Hey everyone,
I've just started looking at Wax and have hit a problem I can't
explain. I want an app to respond to every character input into a
TextBox.
Here's a simple, working example:
+++
from wax import *
| | |
by: Dijkstra |
last post by:
Hi! I am writing a program in which I need to keep track of how many objects of a given class exists at a time. The task is to do it using templates. The objects to be counted are of the class Note:
class Note : public Countable<Note> {
private:
...
public:
Note();
Note(double points, int time);
Note(double points, string time);
~Note();
|
by: Erik Johnson |
last post by:
I ran into a problem I didn't understand at first. I got part of it figured
out. Let me first demonstrate the original problem:
class Super(object):
def __init__(self):
self._class = 'Super'
def hello(self):
print "%s says 'Hello'" % self._class
|
by: manatlan |
last post by:
I've got an instance of a class, ex :
b=gtk.Button()
I'd like to add methods and attributes to my instance "b".
I know it's possible by hacking "b" with setattr() methods. But i'd
like to do it with inheritance, a kind of "dynamic subclassing",
without subclassing the class, only this instance "b" !
In fact, i've got my instance "b", and another class "MoreMethods"
|
by: Christian Heimes |
last post by:
Rick King schrieb:
datetime.date is a C extension class. Subclassing of extension classes
may not always work as you'd expect it.
Christian
|
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, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
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 effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
| | |
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, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
|
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
| | |
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
| |
