Penzai 0.1.2

New features:

• Penzai's pretty printer Treescope can now be more easily extended to work with custom types, by defining the special method __penzai_repr__, which will be detected during pretty-printing. Renderings of these custom types can be built using penzai.treescope.repr_lib, a stable extension API that can be used to implement __penzai_repr__ in a forwards-compatible way. (Note that the exact internal representation of Treescope renderings is still unstable and may change in the future; see the documentation for penzai.treescope for details.)
• Added pz.ts.basic_interactive_setup(), which simplifies setting up the pretty-printer in an IPython notebook.

Bug fixes and improvements:

• Improved detection of mutable vs immutable objects during pretty-printing.
• Fixed detection of special methods _repr_html_ and __penzai_repr__ to avoid objects that generate arbitrary attributes dynamically.
• Copy-path buttons are no longer shown for the root node.

Documentation changes:

• Documentation has been added for how to extend penzai.treescope to render custom types in a stable way.
• The right-hand sidebar now shows more detail in tutorial notebooks.