pystring | C++ functions matching the interface and behavior of python

Is there a way to get a string from a user and convert it into a python code?

I am trying to get used to python+java interaction and so I wrote a little python-script that I wanted to execute that script from my Spring Boot Application. That script is located in the (relative from the .java-file) path /scripts_py/getStockPrice.py that contains the getStockPrice-method (see code below). So I integrated jython and tried to execute the following CronJob:

I'm chasing a memory leak that seems to come from a long-running process which contains a C extension that I wrote. I've been poring over the code and the Extensions docs and I'm sure it's correct but I'd like to make sure regarding the reference handling of PyList and PyDict.

From the docs I gather that PyDict_SetItem() borrows references to both key and value, hence I have to DECREF them after inserting. PyList_SetItem() and PyTuple_SetItem() steal a reference to the inserted item so I don't have to DECREF. Correct?

Creating a dict:

I am trying to migrate services on my Ubuntu 16.04 server to docker 18.09.2 (so that I can leverage kubernetes). My problem is getting a Jar to work in Docker the way it works in my local machine and server.

Namely, I am trying to run a python script inside of my Java Spring Boot Application, capture the output of the Python, and then display the text. This works fine on my local machine , but when I build it on the docker base image and run it, nothing happens (i.e. null value is returned from Buffered Reader)

The base docker image is 'openkbs/jre-mvn-py3'. The 'HelloWorld.py' file is located in the SpringBoot project directory.

Taking from openkbs's documentation (https://hub.docker.com/r/openkbs/jre-mvn-py3/), I have tried a few different command's in my processString, but nothing is working. Commands like:

docker run -it --rm openkbs/jdk-mvn-py3 python3 -c 'print("Hello World")'

docker run -i --rm openkbs/jdk-mvn-py3 python3 < HelloWorld.py

Here are my relevant configurations and lines of code:

Dockerfile:

I'm currently finding a way to get some output from a python script through Java. After finding jython, I used PythonInterpreter to send parameters and receive output I expect.

My Code

I am trying to pass a list of string to a C++ function that takes a char** as argument using Cython.

I tried other solutions I can't remember but I mainly tried the two following options:

1. Using a convertion function extracted from here, which is basically the same answer than here, but it raises an error, on the g++ compilation which is

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