LTspice is one of the best schematic entry tools out there. It lets you draw any schematic imaginable. LTspice's simple appearance belies its true power.

• You can draw graphs for computer science.

• You can define buses.

• You can nest schematics for complex hierarchies.

Now if only we could use these schematics in a Python GUI.

The AscCanvas class lets you import a schematic and show it as a wxPython window. It supports zooming, scrolling, searching and subclassing. It uses rtreelib to look up symbols and nets under the mouse pointer.

To show a schematic, you will need to import these files:

• ASY files are symbols, i.e., components, and they are imported in batch by specifying a list of paths. Load them by calling AscCanvas.load_symbols()

• ASC files are schematics. They define the connectivity between instances of symbols. Load them by calling AscCanvas.load_asc().

asc_viewer is a demo executable that lets you open schematics and shows how to use AscCanvas.

pip install asc_viewer