Howto python fillet a track

[Qbort]

I’m not sure I understand what you want to achieve that can’t be done natively in KiCad

Arc track interactive resizing is here:

Post-v5 new features and development news

Arc track / Curved track interactive resizing has made it into v6 as part of MR 608. This should trickle into the nightlies over the next few days. Notes: Does not do anything on 180 degree arc tracks. Does not do any on-line DRC checks as this is not part of the router at the moment. The resizing operation is started as part of a “drag” action (either “45 degree” or “free”). This means: You can press ‘G’ or ‘D’ on the keyboard to start the process. You can also just click and drag to resize…