topic Re: Python & JSL function in Discussions

Python & JSL function

hogi — Thu, 06 Nov 2025 11:34:18 GMT

From I just learned about this nice new function:

import jmp jmp.globals['pi'] = 3.1415927 jmp.globals['bB'] = 'Bumble Bee' print( jmp.globals.items() )

to define variables in the JSL namespace - like a push version of Python Get()

There are some restrictions. E.g. , at the moment jmp.globals doesn't know JSL functions:

::f= function({x},x);
x="hello";
y=5;
z={1,2,3};
aa= associative Array({1,2});
Python Submit("
import jmp
print(jmp.globals)");

the response:

Maybe a related issue? :
The attempt to create a function via run_jsl with this JSL code:

import jmp jmp.run_jsl('x="hello";Caption(x)') # OK jmp.run_jsl('f= function({x},x)') # crash

... leads to a crash!?!

when you run the code line by line, you will get this error message:

Re: Python & JSL function

Paul_Nelson — Thu, 06 Nov 2025 15:13:08 GMT

A bug. JMP 19?

I get a different error message on my machine but it appears that the run_jsl() is acting as if an eval(f = function({x},x)) is occurring rather just the assignment.

I was able to recreate what I was seeing from Python, with just running from JSL.

Re: Python & JSL function

Dahlia_Watkins — Thu, 06 Nov 2025 16:59:09 GMT

Yes, @hogi is running JMP 19.0.1. He sent an email to support asking if this was a known bug.

Re: Python & JSL function

hogi — Thu, 06 Nov 2025 21:12:44 GMT

Same issue with JMP19 and JMP19.0.1 (Windows version).
With JMP 18, there is no issue.

Interesting that
eval(f = function({x},x))
is different from
f = function({x},x).
So, it evaluates the argument before evaluating the return value of the argument?

Eval(print(1);Parse("print(2)"));

Significantly different:

with the Python code, JMP crashes on my system (maybe there is a difference between Win and Mac?)
with eval(f = function({x},x)) JMP shows a JMP alert and continues alive: