Set Persistent global variable using pymxs

[stevkalinowski]

Hello,

I'm attempting to set persistent global variables in 3ds Max 2018 using pymxs.  Is this currently possible?  I have had a hard time finding any examples of this.

Here are some things that I have tried.  Each of these results in an "unsaveable file".  If I hit save after any of these Max crashes.

import pymxs

pymxsRt = pymxs.runtime
pymxsMp = getattr(pymxsRt, '%make_persistent')

global gTest

gTest = []
gTest.append('qwer')
gTest.append('asdf')
gTest.append('zxcv')

pymxsRt.persistents.append(gTest)

import pymxs

pymxsRt = pymxs.runtime
pymxsMp = getattr(pymxsRt, '%make_persistent')

global gTest

gTest = []
gTest.append('qwer')
gTest.append('asdf')
gTest.append('zxcv')

pymxsMp( gTest, pymxsRt.persistents )

import pymxs

pymxsRt = pymxs.runtime
pymxsMp = getattr(pymxsRt, '%make_persistent')

global gTest

gTest = []
gTest.append('qwer')
gTest.append('asdf')
gTest.append('zxcv')

pymxsMp( gTest )

I'm trying to avoid going between python and MaxScript since I have a PySide2 GUI and I have to pass data back and forth.

Also, are persistent global variables not advised for any reason?

[denisT.MaxDoctor · Accepted solution]

first of all you have to make MXS global... not a Python global.

the only way to do it with pymxs i see:

rt = pymxs.runtime
rt.execute('global abcd')

after that use MXS struct "persistents":

rt.persistents.make('abcd')
rt.persistents.isPersistent('abcd')
rt.persistents.gather()

to set/get use "globalVars"

rt.globalVars.set('abcd', 12)
rt.globalVars.get('abcd')

to remove use "persistents" and "globalVars"

[denisT.MaxDoctor]

maybe with MaxPlus you can get direct access to "globals" and "persistents" sdk HashTable(s).. i never tried  

[denisT.MaxDoctor]

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@denisT.MaxDoctor wrote:

maybe with MaxPlus you can get direct access to "globals" and "persistents" sdk HashTable(s).. i never tried  

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at first glance it is impossible... i don't see any classes for that.

[stevkalinowski]

Hey hey!  How you doing man!

Thanks a bunch, this seems to work just fine.