Set familyName via script

Hi, I’m updating my custom script for automatic instance creation from G2 to G3 API. Before, I used instance.customParameters["familyName"] = "...", but if I’m not mistaken, familyName moved to parameters in G3. I can’t figure out how to set it though. I’m quite sure it’s dead simple, but with my limited skills I can’t figure out how to do it. Any help would be much appreciated. Thank you! Ondrej

Hi @setuptype, I’m figuring out how to do it the simplest way for you. I will respond to you soon

@setuptype, this should work

from GlyphsApp import GSFontInfoValueLocalized, GSFontInfoValue

def changeDefaultFamilyNameForInstance(instanceObj, newName):
	function that allows you to change the "Localized Family Name" instance property.
	It works specifically for default language tag (dflt).
	languageTag = "dflt"
	for p in
		if p.key == "familyNames": 	
			for value in p.values:		
				if value.languageTag == languageTag:
					value.value = newName

	localizedCustomFamilyName = GSFontInfoValueLocalized()
	localizedCustomFamilyName.key = "familyNames"
	nameValue = GSFontInfoValue()
	nameValue.languageTag = languageTag
	nameValue.value = newName

	# end of function

for instance in Glyphs.font.instances:
	changeDefaultFamilyNameForInstance(instance, "myNewFamilyName2")

I created this function changeDefaultFamilyNameForInstance. You should use it in order to change the family name for your instance. Below the function, you can see an example of how to implement it. It should be rather simple.

I hope it helps. If you will have any issues just write :slight_smile:


There is a method: instance.setProperty_value_languageTag_("familyNames", value, "dflt") that does exactly that.

1 Like

Thank you @RafalBuchner and @GeorgSeifert!