VariableView class¶

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

class brian2.core.variables.VariableView(name, variable, group, dimensions=None)[source]¶

A view on a variable that allows to treat it as an numpy array while allowing special indexing (e.g. with strings) in the context of a Group.

Attributes

Methods

`get_item`(item[, level, namespace])	Get the value of this variable.
`get_subexpression_with_index_array`(item, …)
`get_with_expression`(code, run_namespace)	Gets a variable using a string expression.
`get_with_index_array`(item)
`set_item`(item, value[, level, namespace])	Set this variable.
`set_with_expression`(item, code, run_namespace)	Sets a variable using a string expression.
`set_with_expression_conditional`(cond, code, …)	Sets a variable using a string expression and string condition.
`set_with_index_array`(item, value, check_units)

Details

get_item(item, level=0, namespace=None)[source]¶: Get the value of this variable. Called by __getitem__.

get_with_expression(code, run_namespace)[source]¶: Gets a variable using a string expression. Is called by VariableView.get_item for statements such as print(G.v['g_syn > 0']).

set_item(item, value, level=0, namespace=None)[source]¶: Set this variable. This function is called by __setitem__ but there is also a situation where it should be called directly: if the context for string-based expressions is higher up in the stack, this function allows to set the level argument accordingly.

set_with_expression(item, code, run_namespace, check_units=True)[source]¶: Sets a variable using a string expression. Is called by VariableView.set_item for statements such as S.var[:, :] = 'exp(-abs(i-j)/space_constant)*nS'

set_with_expression_conditional(cond, code, run_namespace, check_units=True)[source]¶: Sets a variable using a string expression and string condition. Is called by VariableView.set_item for statements such as S.var['i!=j'] = 'exp(-abs(i-j)/space_constant)*nS'