Adding Axis Mappings custom parameter with script

Scripting
1

Hello, I am trying to write a script that adds the Axis Mappings custom Parameter to my font with a specified set of values. I have tried everything under the sun, but when I run the script, the Axis Mappings parameter that is added is empty. When I run print(parameter) to list all parameters, it gives me <GSCustomParameter Axis Mappings: None>. My script is as follows:

for font in Glyphs.fonts:
	font.customParameters["Axis Mappings"] = "{\
    wght =     {\
        700 = 700;\
        300 = 307;\
        400 = 485;\
        200 = 200;\
    };"

What in the world am I doing wrong? I have tried numerous ways of leaving out the outermost brackets, shifting the indents around, lalala. Help. Please! Thank you :grin:

2

One way to find out is to create a custom parameter manually and then, in a quick script, ask for its value and for the type of the value with type(value).

3

Brilliant, thanks, I will try that.

4

So, in case I understood you correctly, I get the following for value and and type(value):

{
    wght =     {
        700 = 700;
        300 = 307;
        400 = 485;
        200 = 200;
    };
}
<objective-c class __NSDictionaryM at 0x7fff88eb9028>

When I paste the value content into my code, it doesn’t work. The syntax is quite different from the other custom parameters. Any clue as to how to write it correctly?

5

You might need to put in a NSDictionary instead of a python dict.
There is a helper method in the wrapper:

from GlyphsApp import objcObject
print objcObject({"S":1})
6

I’m afraid I don’t follow. I’m quite the layman when it comes to this. What do I need to do with this in order to write an Axis Mappings custom parameter?

7

I should have looked at you code properly.

You are setting a string where you need to set a dict.

font.customParameters["Axis Mappings"] = {
	"wght": {
		700: 700,
		300: 307,
		400: 485,
		200: 200,
	}
}
1 Like
8

You’re an absolute treasure. Thank you so much. That works perfectly! Have a fantastic day.