manzt/anywidget anywidget@0.7.0

on GitHub

Minor Changes

• feat(experimental)!: Require include in _get_anywidget_state signature (#317)

  Allows implementors to avoid re-serializing fields which aren't needed to send
  to the front end. This is a BREAKING change because it requires implementors
  of _get_anywidget_state to account for include in the function signature.

  from dataclasses import dataclass, asdict
  from io import BytesIO
  
  import polars as pl
  import psygnal
  
  @psygnal.evented
  @dataclass
  class Foo:
    value: int
    df: pl.DataFrame
  
    def _get_anywidget_state(self, include: set[str] | None):
      data = asdict(self)
      if include and "df" in include:
        with BytesIO() as f:
          self.df.write_ipc(f)
          data["df"] = f.getvalue()
      else:
        del data["df"] # don't serialize df to bytes
      return data