# Constant class¶

(Shortest import: from brian2.core.variables import Constant)

class brian2.core.variables.Constant(name, value, dimensions=Dimension(), owner=None)[source]

A scalar constant (e.g. the number of neurons N). Information such as the dtype or whether this variable is a boolean are directly derived from the value. Most of the time Variables.add_constant should be used instead of instantiating this class directly.

Parameters

name : str

The name of the variable

dimensions : Dimension, optional

The physical dimensions of the variable. Note that the variable itself (as referenced by value) should never have units attached.

value: reference to the variable value :

The value of the constant.

owner : Nameable, optional

The object that “owns” this variable, for constants that belong to a specific group, e.g. the N constant for a NeuronGroup. External constants will have None (the default value).

Attributes

 value The constant’s value

Methods

 Return the value associated with the variable (without units).

Details

value

The constant’s value

get_value()[source]

Return the value associated with the variable (without units). This is the way variables are accessed in generated code.