How to add a hidden custom attribute to BlockLayout

[hom]

Hi, thanks much for this ezdxf tool, I want to add a custom hidden attribute to BlockLayout recently and use the attribute value to run some logic code. I try to use add_attdef and add_attrib function, But the attribute value always shown in AutoCAD, unless I set the attribute value is "".

I found the ATTMODE system variable in AutoCAD , if set this varible to 0(default is 1), the value will hide as I want. But I can not find a way to change this default value in ezdxf. And I found the variable is defined in src/ezdxf/sections/headervars.py +180, so what I should do to solve this problem?

Thanks very much, waiting for your reply

[mozman]

Setting header variables in the HEADER section:

doc.header["$ATTMODE"] = 0

Setting a block reference (INSERT entity) attribute invisible:

attribute = blockref.add_attribute("TAG_NAME", "VALUE_STR")
attribute.is_invisible = True

[hom]

Ok, thanks very much, got it and I will have a try : )