param_parameterized_class_with_validated_typed_attributes.py

1import param
2
3class Shape(param.Parameterized):
4    radius = param.Number(default=1.0, bounds=(0, None), doc="Radius of the shape")
5    color  = param.ObjectSelector(default="red", objects=["red", "yellow", "blue"])
6
7# Instantiate the class
8shape = Shape(radius=2, color="blue")
9
10# Access parameters
11print(f"Radius: {shape.radius}")
12print(f"Color: {shape.color}")
13
14# Parameters are validated; the following would raise a ValueError:
15# shape.radius = -1
16# shape.color = "green"