How Can I Call %SYSTEM class methods from Embedded Python?

Question

Question

Evgeny Shvarov · Oct 20, 2022

Hi, devs!

What's the way to call the methods of %SYSTEM class from python?

I tried this way:

print(iris.cls('_SYSTEM.OBJ').Version())

and getting an error:

Traceback (most recent call last):
  File "<input>", line 1, in <module>
RuntimeError: iris.class: error finding class

Here is how it works in ObjectScript:

USER>w ##class(%SYSTEM.OBJ).Version()
InterSystems IRIS Version 2022.1.0.209
USER>

Thoughts?

Product version: IRIS 2022.1

Discussion (4)3

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Jolyon Smith · Oct 20, 2022

You don't need to change the "%" to a "_" in this instance as the cls method is being passed a string literal. This works fine:

print(iris.cls('%SYSTEM.OBJ').Version())
InterSystems IRIS Version 2022.1.0.209

2 0

Rich Taylor · Oct 21, 2022

You can also use the iris.system object in python.

iris.system.Version.GetVersion() returns the full version ($ZV)

IRIS for UNIX (Ubuntu Server LTS for x86-64 Containers) 2022.2 (Build 356U) Thu Oct 6 2022 22:56:28 EDT

There are other methods here to call to such as GetMajor() which would return '2022' and GetPlatform() which returns 'Ubuntu Server LTS for x86-64 Containers'

do dir(iris.system.Version) at the python shell to see them all.

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score 0 · Answer 1 · 2022-10-21T13:16:46-04:00

That’s a bit confusing with “%” method names like %New() and %Save() that are supposed to called as _New() and _Save() via python , but makes sense. Thank you @Jolyon Smith!

score 0 · Answer 2 · 2022-10-21T17:00:44-04:00

Evgeny Shvarov · Oct 21, 2022

Wow! That's cool! Didn't know that, thank you @Rich Taylor!

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