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# encoding: utf-8
"""
Defines exceptions for the PyNN API
InvalidParameterValueError
NonExistentParameterError
InvalidDimensionsError
ConnectionError
InvalidModelError
RoundingWarning
NothingToWriteError
InvalidWeightError
NotLocalError
RecordingError
:copyright: Copyright 2006-2022 by the PyNN team, see AUTHORS.
:license: CeCILL, see LICENSE for details.
"""
class InvalidParameterValueError(ValueError):
"""Inappropriate parameter value"""
pass
class NonExistentParameterError(KeyError):
"""
Model parameter does not exist.
"""
def __init__(self, parameter_name, model_name, valid_parameter_names=['unknown']):
Exception.__init__(self)
self.parameter_name = parameter_name
self.model_name = model_name
self.valid_parameter_names = sorted(valid_parameter_names)
def __str__(self):
return "%s (valid parameters for %s are: %s)" % (self.parameter_name,
self.model_name,
", ".join(self.valid_parameter_names))
class InvalidDimensionsError(ValueError):
"""Argument has inappropriate shape/dimensions."""
pass
class ConnectionError(Exception):
"""Attempt to create an invalid connection or access a non-existent connection."""
pass
class InvalidModelError(Exception):
"""Attempt to use a non-existent model type."""
pass
class NoModelAvailableError(Exception):
"""The simulator does not implement the requested model."""
pass
class RoundingWarning(Warning):
"""The argument has been rounded to a lower level of precision by the simulator."""
pass
class NothingToWriteError(IOError):
"""There is no data available to write."""
pass
class InvalidWeightError(ValueError):
"""Invalid value for the synaptic weight."""
pass
class NotLocalError(Exception):
"""Attempt to access a cell or connection that does not exist on this node (but exists elsewhere)."""
pass
class RecordingError(Exception): # subclass AttributeError?
"""Attempt to record a variable that does not exist for this cell type."""
def __init__(self, variable, cell_type):
self.variable = variable
self.cell_type = cell_type
def __str__(self):
msg = "Cannot record %s from cell type %s. Available variables are %s"
return msg % (self.variable,
self.cell_type.__class__.__name__,
",".join(self.cell_type.recordable))
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