armi.reactor.parameters.parameterCollections module

armi.reactor.parameters.parameterCollections.GLOBAL_SERIAL_NUM = 27977

The serial number for all ParameterCollections

This is a counter of the number of instances of all types. They are useful for tracking items through the history of a database.

Warning

This is not MPI safe. We also have not done anything to make it thread safe, except that the GIL exists.

class armi.reactor.parameters.parameterCollections.ParameterCollection(_state: Optional[List[Any]] = None)

Bases: object

An empty class for holding state information in the ARMI data structure.

A parameter collection stores one or more formally-defined values (“parameters”). Until a given ParameterCollection subclass has been instantiated, new parameters may be added to its parameter definitions (e.g., from plugins). Upon first instantiation, applyParameters() will be called, binding the parameter definitions to the Collection class as descriptors.

It is illegal to redefine a parameter with the same name in the same class, or its subclasses, and attempting to do so should result in exceptions in applyParameters().

Variables:

• _backup (str) – A pickle dump of the __getstate__, or None.

• _hist (dict) – Keys are (paramName, timeStep).

• assigned (int Flag) –

  indicates the synchronization state of the parameter collection. This is used to reduce the amount of information that is transmitted during database, and MPI operations as well as determine the collection’s state when exiting a Composite.retainState.

  This attribute when used with the Parameter.assigned attribute allows us to efficiently perform many operations.

See also

armi.reactors.parameters

Create a new ParameterCollection instance.

Parameters:

_state – Optional list of parameter values, ordered by _allFields. Passed values should come from a call to __getstate__(). This should only be used internally to this model.

pDefs: ParameterDefinitionCollection = <armi.reactor.parameters.parameterDefinitions.ParameterDefinitionCollection object>

classmethod applyParameters()

Apply the definitions from a ParameterDefinitionCollection as properties.

This places the parameter definitions in the associated ParameterDefinitionCollection onto this ParameterCollection class as class attributes. In the process it recursively calls the same method on base classes, and adds their parameter definitions as well. Since each instance of Parameter implements the descriptor protocol, these are effectively behaving as @property-style accessors.

This function must act on each ParameterCollection subclass before the first instance is created. Subsequent calls will short-circuit. Before calling this method, it is possible to add more Parameters to the associated ParameterDefinitionCollection, cls.pDefs. After calling this method, the ParameterDefinitionCollection will be locked, preventing any further additions.

This method is called in the __init__() method, but can also be called proactively to compile the parameter definitions earlier, if desired.

See also

armi.reactor.parameters.parameterDefinitions.ParameterDefinitionCollection

items()

get(key, default=None)

Return a requested parameter value, if possible.

This functions similarly to the same method on a dict or similar. If there is a value present for the requested parameter on this parameter collection, return it. Otherwise, return the supplied default. The main reason for using this is for safely attempting to access a parameter that doesn’t have a default value, and may not have been set. Other methods for accessing parameters would raise an exception.

keys()

values()

update(someDict)

property paramDefs: ParameterDefinitionCollection

Get the ParameterDefinitionCollection associated with this instance.

This serves as both an alias for the pDefs class attribute, and as a read-only accessor for them. Most non-paramter-system related interactions with an object’s ParameterCollection should go through this. In the future, it probably makes sense to make the pDefs that the applyDefinitions and ResolveParametersMeta things are sensitive to more hidden from outside the parameter system.

getSyncData()

Get all changed parameters SINCE_LAST_DISTRIBUTE_STATE (or syncMpiState).

If this ParmaterCollection (proxy for a Composite) has been modified SINCE_LAST_DISTRIBUTE_STATE, this will return a dictionary of parameter name keys and values, otherwise None.

backUp()

Back up the state in a Pickle.

restoreBackup(paramsToApply)

Restore the backed up the state in a from a pickle.

Parameters:

paramsToApply (list of ParmeterDefinitions) – restores the state of all parameters not in paramsToApply

serialNum

Metadata about a specific parameter.

armi.reactor.parameters.parameterCollections.collectPluginParameters(pm)

Apply parameters from plugins to their respective object classes.

armi.reactor.parameters.parameterCollections.applyAllParameters(klass=None)