Utilities

Utility modules

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orion.core.utils – Package-wide useful routines

class orion.core.utils.AbstractSingletonType(name, bases, dictionary)

This will create singleton base classes, that need to be subclassed and implemented.

Methods

__call__(*args, **kwargs)	Create an object if does not already exist, otherwise return what there is.
mro(/)	Return a type’s method resolution order.
register(subclass)	Register a virtual subclass of an ABC.

class orion.core.utils.Factory(names, bases, dictionary)

Instantiate appropriate wrapper for the infrastructure based on input argument, of_type.

Attributes:

types : list of subclasses of cls.__base__

Updated to contain all possible implementations currently. Check out code.

typenames : list of str

Names of implemented wrapper classes, correspond to possible of_type values.

Methods

__call__(of_type, *args, **kwargs)	Create an object, instance of cls.__base__, on first call.
mro(/)	Return a type’s method resolution order.
register(subclass)	Register a virtual subclass of an ABC.

exception orion.core.utils.SingletonAlreadyInstantiatedError(name)

Exception to be raised when someone provides arguments to build an object from a already-instantiated SingletonType class.

class orion.core.utils.SingletonFactory(name, bases, dictionary)

Wrapping Factory with SingletonType. Keep compatibility with AbstractSingletonType.

Methods

__call__(*args, **kwargs)	Create an object if does not already exist, otherwise return what there is.
mro(/)	Return a type’s method resolution order.
register(subclass)	Register a virtual subclass of an ABC.

exception orion.core.utils.SingletonNotInstantiatedError(name)

Exception to be raised when someone try to access an instance of a singleton that has not been instantiated yet

class orion.core.utils.SingletonType(name, bases, dictionary)

Metaclass that implements the singleton pattern for a Python class.

Methods

__call__(*args, **kwargs)	Create an object if does not already exist, otherwise return what there is.
mro(/)	Return a type’s method resolution order.

orion.core.utils.nesteddict()

Extend defaultdict to arbitrary nested levels.