Recently decided to upgrade my project to Kotlin J...

# datascience

[Peter]

Recently decided to upgrade my project to Kotlin Jupyter 0.11.0-125 and although all the runtime code is still fine, the test module that I’m using in my unit tests (kotlin-jupyter-test-kit) changed a lot.

Are there examples or documentation how to use it, especially how to create in instance of ReplForJupyterImpl with its many parameters (like MutableNotebook, RuntimeKernelProperties) ?

[Ilya Muradyan]

Hi, Peter! Sorry for that. Just use org.jetbrains.kotlinx.jupyter.repl.creating.createRepl instead

[Peter]

Thanks, just tried it and one step closer.

Remains the mandatory properties. Right now I take a very simple approach:

runtimeProperties = RuntimeKernelProperties(emptyMap()),

But then I get exceptions like:

java.lang.RuntimeException: Current branch is not specified!

	at org.jetbrains.kotlinx.jupyter.RuntimeKernelProperties.getCurrentBranch(config.kt:73)
	at org.jetbrains.kotlinx.jupyter.ReplForJupyterImpl.getCurrentBranch(repl.kt:193)
	at org.jetbrains.kotlinx.jupyter.ReplForJupyterImpl.<init>(repl.kt:199)
	at org.jetbrains.kotlinx.jupyter.repl.creating.ReplFactory.createRepl(ReplFactory.kt:18)

[Ilya Muradyan]

You may pass nothing there, the default properties will be used then. and it's enough. Or you need some special properties?

[Ilya Muradyan]

If you need to access runtime properties of created REPL, use runtimeProperties property

[Peter]

I thought using the following statement would create empty properties:

runtimeProperties = RuntimeKernelProperties(emptyMap())

What would the correct way to create an empty instance of ReplRuntimeProperties that I can use as a parameter to the createRepl (it is defined as non-null)?

[Ilya Muradyan]

You need to specify at least three properties - all the properties that throw exceptions if they're empty:
https://github.com/Kotlin/kotlin-jupyter/blob/7146f1fdcd4bc5dacaab635c302b0a5497bcd1d1/src/main/kotlin/org/jetbrains/kotlinx/jupyter/config.kt#L52

These properties are taken from resource file that is stored inside kernel JAR, that's why you most likely wish to reuse them. In this case, just use
org.jetbrains.kotlinx.jupyter.defaultRuntimeProperties

Alternatively, implement ReplRuntimeProperties interface and use this implementation

[Peter]

Thanks, that indeed solved the second challenge and my notebook regression tests are running fine again 🙂