Call custom method

[jiawei.liu]

Can I use the library of custom modules in python script?
if it is possible, can provide me an example

[nminchin]

Python, Jython, CPython, Libraries, Pip, and Python 2.7 vs 3 - A quick primer

We wrote up a Knowledge Base article a little while back that I wanted to post here. It goes over a variety of questions that are common with regard to Python in Ignition. If you’re looking for information on the topic, take a glance at the linked article.

[JordanCClark]

Be sure to read the article Nick mentioned first.

Procedure for installing python libraries from source

There’s actually a procedure you can use to use pip from within Jython to install packages, then link Ignition’s Jython lib to an-off-the-shelf Jython lib and use that…however, the article specifically calls out the twilio module as not working, because one of its dependencies, cffi, has C dependencies (IE, won’t work in Jython). For posterity, here’s the procedure, copied verbatim from an internal document: 0) On the server, install Java 8 if you haven’t already. Download the full Jython 2.…

[jiawei.liu]

Do I have to put the library in pylib to use it？ because the library I need to use is stored in the custom module file.

[JordanCClark]

Perhaps more information is needed. If you’re talking about modules built through the SDK, then examples are provided on IA’s github site.

inductiveautomation/ignition-sdk-examples

[jiawei.liu]

OK,
Thanks for getting back to me.

[pturmel]

Custom modules should expose the java that they want to be callable from jython via the module hook’s initializeScriptManager() method. In the gateway, it will be called multiple times on startup (for each project) and thereafter on project updates.