Python NotImplemented constant

Looking through decimal.py, it uses NotImplemented in many special methods. e.g. class A(object): def __lt__(self, a): return NotImplemented def __add__(self, a): return...

What is the difference between __str__ and __repr__?

What is the difference between __str__ and __repr__ in Python?

How to enable design support in a custom control?

I'll try to explain what I'm after. I don't know the technical term for it, so here goes: Example 1: If I place a ListView on a Form and add some columns I am able, in Design-Time, to...

VSTO in VBA: AddIn.Object returns Nothing (null) sometimes

Given: A VSTO Add-In An override object RequestComAddInAutomationService() which returns an instance of a class which is called Facade in my scenario. A VBA macro in Excel 2007 which accesses the...

How to write a static python getitem method?

What do I need to change to make this work? class A: @staticmethod def __getitem__(val): return "It works" print A[0] Note that I am calling the __getitem__ method on the type A.

Roxygen2 - how to properly document S3 methods

I've read the Roxygen2 PDF as well as this site and I'm lost about the difference between @method @S3method @export and how you use these to properly document S3 methods. I worked up the follow...

Doctrine and LIKE query

I have entity for Doctrine: <?php /** * @Entity * @Table(name="orders") */ class Orders { /** @Id @Column(name="OID",type="integer") @GeneratedValue */ private $id; /**...

How to use a findBy method with comparative criteria

I'd need to use a "magic finder" findBy method using comparative criteria (not only exact criteria). In other words, I need to do something like this: $result =...

how to understand appengine ndb.tasklet?

From documentation: An NDB tasklet is a piece of code that might run concurrently with other code. If you write a tasklet, your application can use it much like it uses an async NDB function: it...

How do I handle a variable number of arguments passed to a function in Racket?

I like creating functions which take an unlimited number of arguments, and being able to deal with them as a list. It's been useful to me when creating binary trees & I'm using it for a variation...

How do I call the default deserializer from a custom deserializer in Jackson

I have a problem in my custom deserializer in Jackson. I want to access the default serializer to populate the object I am deserializing into. After the population I will do some custom things but...

Using Django-taggit with django-rest-framework, i'm not able to save my tags

I'm trying to figure it out why when i submit my form, my tags are not saved in my db. Pretty new with the django-rest-framework and Django-taggit too, i think i'm doing something wrong :) First,...

Laravel Custom Model Methods

Whenever I add additional logic to Eloquent models, I end up having to make it a static method (i.e. less than ideal) in order to call it from the model's facade. I've tried searching a lot on how...

Calling methods surrounded by __ in Python

I'm reading a book on Python, and it says that when you make a call to help(obj) to list all of the methods that can be called on obj, the methods that are surrounded by __ on both sides are...

PHP object oriented form generator

I am trying to create an object oriented form generator. Please keep in mind it will be used only by a handful of people in our company to solve a specific problem. I am currently facing two...

Extension method for a function

I can create extension methods off any type. Once such type is Func of int for example. I want to write extension methods for functions, not the return type of functions. I can do it in a hacky...

Calling ToList() on ConcurrentDictionary<TKey, TValue> while adding items

I've run into an interesting issue. Knowing that the ConcurrentDictionary<TKey, TValue> is safely enumerable while being modified, with the (in my case) unwanted side-effect of iterating over...

Deserialise IList<Interface> in JSON.NET

I have some json that I want to Deserialise. It's very easy to deserialise back to an List However I am working with interfaces, and this is what I need the deserialisation to end up at: So Let's...

Getting error on deleted line of code, what is going on here?

I got an error when trying to edit my authorization rules in the web.config file, from code behind. So I removed the faulty code. Still got the error. Thought it might be a bug in visual studio so...

How to fix SQLAlchemy connection problem: 'Connection info needed in SQLAlchemy format' when connecting to IBM db2 server hosted on IBM Cloud

So, I've been trying to connect to the IBM DB2 server hosted on IBM cloud for the past few days and managed to connect to it using the provided credentials and the 'ibm_db', 'ibm_db_sa', and the...

Ignore specific logging line temporarily

I have a method called import_customers() which loads csv-like data. This methods logs to log-level INFO. In one case I want to avoid this logging. I see several ways: Variant 1: a new kwarg like...

How to implement mutations with optional arguments in GraphQL?

I am learning about graphql, and went through the https://www.howtographql.com/graphql-js/3-a-simple-mutation/ tutorial, and was interested in what the implementation of the updateLink mutation as...

how to make drf HyperlinkedModelSerializer elegantly work with app_name?

I am using drf in django project # project/urls.py from django.urls import include, path urlpatterns = [ ... path('drf/', include('api.urls')), ... ] in a dedicated app which I...

__new__ method giving error object.__new__() takes exactly one argument (the type to instantiate)

why the following code is giving error? class Foo: def __new__(cls, *args, **kwargs): print("Creating Instance") instance = super(Foo, cls).__new__(cls,*args, **kwargs) ...

Start notebook from other notebook

Using jupyter-lab %run otherNotebook.ipynb gives the following error message Error: file not found otherNotebook.ipynb.py How can I use the magic method and prevent it from adding .py to the file

Python - modifying variable passed to function

If I have a function f(x) and variable var of any type and scope is there any way to modify var inside call to f(var)? Meaning that function f does some magic stuff to get reference to original...

Scene Text Image Super-Resolution for OCR

I am working on an OCR system. A challenge that I'm facing for recognizing the text within ROI is due to the shakiness or motion effect shot or text that is not focus due to angle positions....

Getting body-Parser is deprecated Warning In Vs code and not Able to get Body tried to use inbuilt body-parser of express

Below Is Code Of app.js file var port = process.env.PORT || 8080; // set our port var express = require('express'); var app = express(); var bodyParser = require('body-parser') var cors =...

Correct way of removing SceneDelegate from iOS 11+ project - What code is necessary in application(_: didFinishLaunchingWithOptions)

When creating a new iOS project in Xcode 12 a UISceneDelegate is added automatically. Since my App should be available on iOS 11+ (which does not support UISceneDelegate) I had to remove...

Using different struct definitions to simulate public and private fields in C

I have been writing C for a decent amount of time, and obviously am aware that C does not have any support for explicit private and public fields within structs. However, I (believe) I have found...