Not sure about ObjectScript terminal but PythonGateway includes Python shell with multiline support:

If it's a File Stream you can set TranslateTable property to your charset before reading.

Otherwise you can use $zcvt function to convert strings.

Here's an example of iterating encodings for $zcvt to determine a correct encoding.

If you are interested in encoding internals use zzdump to check hexdumps.

If your encoding is region specific don't forget to set your locale.

Persistent classes:

SELECT Name
FROM %Dictionary.ClassDefinition_SubclassOf('%Persistent')

List properties and relationships (if you need subset - filter by parent - it's a class):

SELECT
parent,  Name, Cardinality, Collection, Id, _Identity,  Relationship, Type
FROM %Dictionary.CompiledProperty

Foreign keys:

SELECT
parent, Name, Properties, ReferencedClass, ReferencedKey
FROM %Dictionary.ForeignKeyDefinition

For everything %Dictionary.Compiled* - includes defined and inherited values, Definitions include only items defined in a current class.

Work with %SYS.Task objects.

Here's an example of creating a task but you can open an existing task too and modify it.

Redefine Login method in you broker and remove:

#; We want Basic authentication
Do %response.SetHeader("WWW-Authenticate","Basic")

Curenlty active setting value (so System Default Setting in your case) should be returned.

I was unable to reproduce the issue on Cache for Windows (x86-64) 2016.1.4 (Build 104_6U) Wed May 22 2019 12:23:59 EDT.

Have you updated your production?

Check that your production definition does not contain old settings.

Check $SYSTEM.SQL.DDLImport().

Some datasets for participants.

Add a new Business Host. If you want to add several, call CallProductionUpdateAndSaveToClass method once at the end.

Include Ensemble

Class test.prod
{

Parameter DOMAIN = "Ensemble";

/// Add new Business Host.
/// productionName - name of production class
/// name - name of item you want to add
/// class - class name of the item you want to add
/// w $System.Status.GetErrorText(##class(test.prod).add())
ClassMethod add(productionName As %Dictionary.CacheClassname = "isc.py.test.Production", name As %String = "MyOperation", class As %Dictionary.CacheClassname = "isc.py.ens.Operation")
{
    Set production = ##class(Ens.Config.Production).%OpenId(productionName)
    
    Set item = ##class(Ens.Config.Item).%New()
    Set item.PoolSize = 1
    Set item.Name = name
    Set item.ClassName = class
    Set:item.Name="" item.Name = item.ClassName
    Set item.Enabled = $$$YES
    Set sc = production.Items.Insert(item)
    Quit:$$$ISERR(sc) sc
    Set sc = $$$AuditModifyProductionConfig(production.Name,item.Name,$$$Text("Item added to production using generator in " _ $classname()))
    Quit:$$$ISERR(sc) sc   
    Set sc = ##class(EnsPortal.Template.prodConfigSCPage).CallProductionUpdateAndSaveToClass(production,"","SaveProduction")
    Quit sc
}

}

Can you expose your service as a REST?

Client-side JS is really not suited to working with web services.

@Yuri.Gomessolution (HandleCorsRequest) would work for REST.

Here are some ideas for contestants:

1. MLOperation. Currently, PythonGateway provides low-level PythonOperation aimed at expert users who write Python code themselves. The idea of MLOperation is to build a high-level Interoperability adapter targeted at a broader userbase. Essentially your adapter provides generalized Fit/Predict/Optimize methods and users need to provide the data, target model type, and hyper parameter values. This closes the gap between the hands-off approach of the IntegratedML and low-level approach of the PythonGateway. The work is described in this issue.
2. New ML language. Interoperability with numerical computational languages or even CASes proper are great and offer the freedom of choice. Furthermore, these math-oriented languages allow faster problem search/space traversal than more generalized languages such as Python. Several classes of supporting ML problems can be solved with them. Callout interface makes implementation process easy (reference implementations: PythonGateway, RGateway, JuliaGateway). Suggested languages: Octave, Scilab. 
3. New showcases in IoT, Real-Time predictions, RPA. Convergent Analytics group provides a lot of starting templates in these fields - as InterSystems IRIS capabilities are an especially good fit for them. I'm always interested in more examples, especially real-life examples of machine learning.
4. Data Deduplication solutions. Do you have a dataset with a lot of dirty data and know how to clean it? Great. Make a showcase out of it.
5. Reinforcement learning showcases. Examples of Partially observable Markov decision process or other reinforcement learning technologies.

Also, note that PythonGateway-Template is built upon the Advanced Analytics image, so you can use both IntegratedML and PythonGateway from the same docker image.

Very interesting.

One of our customers is running BPMN processes in Ensemble.

Would like to read about your approach.

Check $SYSTEM.Sharding.DeassignShard().

%Net.HttpRequest is a correct way to go about it.

Use this Task to run Business Service via Task Manager.

Alternatively you can use Ensemble Scheduling.

How many files are there in total?

How many (on average) do you need to process per day?

Please post the code of GatewayState method.

ObjectScript ClassExplorer.

Sample Community Adapter for RabbitMQ.