what's the use of __repr__?when shall I use it?

Similar topics

Access to formatting controls from within __repr__ or __str__?

by: Dan Sommers | last post by:

Hi, I have a class whose objects represent physical quantities including uncertainties and units, and I would like more control over the way they print. I have a __str__ method which outputs the quantity and its uncertainty, properly rounded (i.e. the uncertainty to one digit and the quantity to the same precision as the uncertainty), followed by the units (mostly) as they accumulated during whatever calculations led to the quantity's

Python

2937

FAQ: __str__ vs __repr__

by: Jan Danielsson | last post by:

Sorry, but I Just Don't Get It. I did search the 'net, I did read the FAQ, but I'm too dumb to understand. As far as I can gather, __str__ is just a representation of the object. For instance: class ServerConnection: def __str__(self): buf = "Server: " + self.name + "\n" buf += "Sent bytes: " + str(self.sentBytes) + "\n"

Python

2134

Is it possible to detect if files on a drive were changed without scanning the drive?

by: Claudio Grondi | last post by:

It is maybe not a pure Python question, but I think it is the right newsgroup to ask for help, anyway. After connecting a drive to the system (via USB or IDE) I would like to be able to see within seconds if there were changes in the file system of that drive since last check (250 GB drive with about four million files on it). How to accomplish this? (best if providing

Python

3368

Rich __repr__

by: Ben Finney | last post by:

Howdy all, The builtin types have __repr__ attributes that return something nice, that looks like the syntax one would use to create that particular instance. The default __repr__ for custom classes show the fully-qualified class name, and the memory address of the instance. If I want to implement a __repr__ that's reasonably "nice" to the

Python

1310

newbee I have an object how to check what's his class?

by: consternation | last post by:

I can't find neither in tutorial nor with google It's all about isinstance, or __class__. How to test that an object is an instance of my X class?? Do I have this problems because I stre my objects in a dict? I wrote a class X like this : class X(object): def __init__(self,name): self.name=name

Python

2450

unicode and __repr__()

by: Martin Drautzburg | last post by:

I am using repr() to pass arrays, dicts and combinations therof to javascript as it already returns a valid javascript expression (a string) right away. But for some reason it does not handle Umlaute correctly and those characters finally appear as two strange characters on the browser. I am using UTF-8 and assembling the string expression manually works okay and the umlaute appear correctly in the browser (so I could probably write my own...

Python

913

__repr__ affected after __getattr__ overloaded?

by: Roc Zhou | last post by:

Now I have to design a class that overload __getattr__, but after that, I found the __repr__ have been affected. This is a simple example model: #!/usr/bin/env python class test: def __init__(self): self.x = 1 def __getattr__(self, attr_name):

Python

2335

why __repr__ affected after __getattr__ overloaded?

by: Roc Zhou | last post by:

Python

1248

Re: Inheriting frozenset gives bug if i overwrite __repr__ method

by: Terry Reedy | last post by:

srinivasan srinivas wrote: When posting problems like this, please include the Python version. If you ran this with 2.6, please run the following: x = frozenset('abc') y = frozenset('bcd') z = x.difference(y) print(id(x) != id(z))

Python

9656

What is ONU?

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...

General

10366

Problem With Comparison Operator <=> in G++

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...

C / C++

10175

Maximizing Business Potential: The Nexus of Website Design and Digital Marketing

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 tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...

Online Marketing

10112

The easy way to turn off automatic updates for Windows 10/11

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,...

Windows Server

8993

AI Job Threat for Devs

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...

Career Advice

6750

Couldn’t get equations in html when convert word .docx file to html file in C#.

by: conductexam | last post by:

I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...

C# / C Sharp

5399

Trying to create a lan-to-lan vpn between two differents networks

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...

Networking - Hardware / Configuration

4070

transfer the data from one system to another through ip address

by: 6302768590 | last post by:

Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system

C# / C Sharp

3675

How to add payments to a PHP MySQL app.

by: muto222 | last post by:

How can i add a mobile payment intergratation into php mysql website.

PHP