param.Number#

class param.Number(default=0.0, *, bounds=None, softbounds=None, inclusive_bounds=(True, True), step=None, set_hook=None, doc=None, label=None, precedence=None, instantiate=False, constant=False, readonly=False, pickle_default_value=True, allow_None=False, per_instance=True, allow_refs=False, nested_refs=False)[source]#

A numeric Dynamic Parameter, with a default value and optional bounds.

There are two types of bounds: bounds and softbounds. bounds are hard bounds: the parameter must have a value within the specified range. The default bounds are (None,None), meaning there are actually no hard bounds. One or both bounds can be set by specifying a value (e.g. bounds=(None,10) means there is no lower bound, and an upper bound of 10). Bounds are inclusive by default, but exclusivity can be specified for each bound by setting inclusive_bounds (e.g. inclusive_bounds=(True,False) specifies an exclusive upper bound).

Number is also a type of Dynamic parameter, so its value can be set to a callable to get a dynamically generated number (see Dynamic).

When not being dynamically generated, bounds are checked when a Number is created or set. Using a default value outside the hard bounds, or one that is not numeric, results in an exception. When being dynamically generated, bounds are checked when the value of a Number is requested. A generated value that is not numeric, or is outside the hard bounds, results in an exception.

As a special case, if allow_None=True (which is true by default if the parameter has a default of None when declared) then a value of None is also allowed.

A separate function set_in_bounds() is provided that will silently crop the given value into the legal range, for use in, for instance, a GUI.

softbounds are present to indicate the typical range of the parameter, but are not enforced. Setting the soft bounds allows, for instance, a GUI to know what values to display on sliders for the Number.

Example of creating a Number:

AB = Number(default=0.5, bounds=(None,10), softbounds=(0,1), doc='Distance from A to B.')

__init__(default=0.0, *, bounds=None, softbounds=None, inclusive_bounds=(True, True), step=None, set_hook=None, allow_None=False, doc=None, label=None, precedence=None, instantiate=False, constant=False, readonly=False, pickle_default_value=True, per_instance=True, allow_refs=False, nested_refs=False)[source]#

Initialize this parameter object and store the bounds.

Non-dynamic default values are checked against the bounds.

Methods

`__init__`([default, bounds, softbounds, ...])	Initialize this parameter object and store the bounds.
`crop_to_bounds`(val)	Return the given value cropped to be within the hard bounds for this parameter.
`deserialize`(value)	Given a serializable Python value, return a value that the parameter can be set to
`get_soft_bounds`()
`schema`([safe, subset, mode])
`serialize`(value)	Given the parameter value, return a Python value suitable for serialization
`set_in_bounds`(obj, val)	Set to the given value, but cropped to be within the legal bounds.

Attributes

`bounds`
`softbounds`
`inclusive_bounds`
`set_hook`
`step`
`allow_None`
`allow_refs`
`constant`
`default`
`doc`
`instantiate`
`label`
`name`
`nested_refs`
`owner`
`per_instance`
`pickle_default_value`
`precedence`
`readonly`
`rx`	The reactive namespace.
`time_dependent`
`time_fn`
`watchers`