Python – How do I rename glyphs in TrueType fonts using TTX/fontTools?

I’m upgrading a TrueType font created with a legacy code page to create a copy of Unicode. I’m playing with Python TTX/fontTools but haven’t figured it out yet:
1. Rename the glyph
2. Merge glyphs from two font files?

Can someone help?

P.S. I also tried Robofab but made a mistake when creating the UFO file.

Maybe these blog entries by FontGeek can help you? Two of them are dealing with TTX/fontttools….

Basically, you need to do it in three steps:

1. Run ttx to convert the font file to an (editable) XML representation.
2. Edit in the XML file.
3. Run ttx again to convert the XML back to a valid font file.