unfreeze

unfreeze(k, inplace=True)

Unfreeze a planar diagram so it can be modified again.

Restores original bound methods from the diagram’s class. Useful when a frozen diagram was used as a dict/set key and you want to mutate it again.

Parameters:

• k (PlanarDiagram | OrientedPlanarDiagram) – Diagram to unfreeze.

• inplace (bool) – If True, unfreeze k in place; otherwise operate on a shallow copy.

Returns:

PlanarDiagram – The unfrozen diagram (k or its copy).

Return type:

PlanarDiagram

Examples

>>> from knotpy.classes.planardiagram import PlanarDiagram
>>> d = PlanarDiagram()
>>> freeze(d)
PlanarDiagram(...)
>>> unfreeze(d)
PlanarDiagram(...)
>>> d.is_frozen()
False
>>> d.add_vertex("x")  # works again