Is there a popular python implementaton of Dunn Index? - cluster-analysis

Some library functions with a API like dunn_index(X, labels)? I cannot find a function like this.

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Package to find synonyms of english words for Dart

do you know a package to find synonyms of english words for the Dart language?
For example something similar to NLTK for python it would be perfect.
hope someone can help me
Thank you :)
I write these words at random otherwise it won't make me postI write these words at random otherwise it won't make me postI write these words at random otherwise it won't make me postI write these words at random otherwise it won't make me post
After doing some research the following packages popped up:
Lemmatizer
Lemmatizer for text in English. Inspired by Python's nltk.corpus.reader.wordnet.morphy
Sadly it doesn't support null safety.
Stemmer.
This package implements a stemming algorithm in Dart. Currently, it supports PorterStemmer and SnowballStemmer. It is a port of the exceptional Python NLTK library.
oxford_dictionary - you would need api key, so based on that I think it is a paid service.
The Oxford Dictionaries API offers an easy way to access powerful lexical data (words, definitions, translations, audio pronunciations, synonyms, antonyms, parts of speech, and more) to use in your apps and websites.
And if you are not in a hurry: the Chaquopy Flutter plugin is planning to support NLTK library in the future. As it says in the description - it is only available in Android.
This is a chaquopy plugin to run python code on android. This is the simplest version, where you can write you code and run it.
I don't know if these packages will do the work, but they could be starting point.
Edit:
As #Dabbel mentioned in his comment:
Lemmatizerx
Lemmatizer for text in English. Inspired by Python's nltk.corpus.reader.wordnet.morphy.

How to find appropriate functions for PureScript?

PureScript have lots of functions available like filter lenth and more. But how can we find the function that we need and its examples with implementation? I am facing problem solving exercises of the book purescript by examples. Any tips how show I go about solving those? Example in the book does not explain everythin.
Really, the most straightforward way would be to use the tooling that comes with the compiler through an editor plugin. You can use ?typehole to get the type of the type hole and get search results for relevant functions.
I also quite often type in a partial identifier and use the completion to look through the implementations, e.g. fil <complete to find various filter definitions.
For all newbie to PureScript who are following PureScript by example book this github link has all the solutions with updated libraries
https://github.com/kvsm/purescript-by-example

Writing library function in postgresql

I want to write library function in postgresql. Is it possible to write such function in .Net or I should use a special language like C to do this.
could you please show me a nice example or article about this?
thank you so much
According to the PostgreSQL procedural language matrix, there is no support for writing backend functions in .NET. But maybe one of the other languages listed there will suit you; it doesn't have to be C.

Traversing a Z3Context using the z3.scala.dsl API

I'm using the scala^Z3 tool for a small library that (among other things) prints the constraints of a Z3Context in latex format. While it's possible to traverse the Z3AST and latex-ify the expressions by string comparison, it would be much nicer to use the object structure of the z3.scala.dsl package. Is there a way to obtain a z3.scala.dsl.Tree from a Z3AST?
It's true that the DSL is currently "write only", in that you can use it to create trees and ship them to Z3 but not to read them back.
The standard way to read Z3 trees is to use getASTKind and getDeclKind from Z3Context. The classes that represent the results are Z3ASTKind and Z3DeclKind respectively. (Since most trees are applications, the latter is where most of the information is).
It looks like the way to do this is create the original constraints using z3.scala.dsl, then add each constraint using Z3Context.assertCnstr (tree: Tree[BoolSort]). This way I have the whole DSL tree for easy transformation to latex. For some reason the examples on the scala^Z3 website assemble the AST without using the DSL at all, so this alternative wasn't obvious.

How to use Brail as a stand-alone general purpose templating engine (like NVelocity)?

I've been using NVelocity as a stand-alone templating engine in my text file generator. The problem with NVelocity is that the macros are quite shaky; pretty much all errors I get are from faulty macro implementation.
It would be cool if I could just use some other templating engine, such as Brail. That way I would just write functions that output strings.
What's the best way of embedding Brail engine? I would like to just pass it a string containing the template (not reading from disk), and I would like to minimize the number of external dependencies.
EDIT: I found the answer myself. Take a look at this source file from Castle.
Try nHaml or Spark as they both support full standalone or direct usage
They both support standard c# functions that return strings etc
Spark is real HTML, nHaml is DRY HTML
Both very cool!