pyqit.set_backend

pyqit.set_backend(backend: str)

Set the quantum computing backend for the current context.

Parameters:

backend ({"pennylane", "torch"}) – Backend every object built afterwards will cache in __init__.

Raises:

• ValueError – If backend is not a supported name.

• ImportError – If backend is "torch" and torch is not installed. Checked here because this is where the choice is made: every torch import downstream is reached only through the backend being set, so without this the failure surfaces later and unrecognisably.