qubit_num: Num qubits
In henry090/Cirq: Interface to 'Cirq'

Description Usage Arguments Value Raises

Num qubits

1	qubit_num(val, default)

`val`	The value to get the number of qubits from.
`default`	Determines the fallback behavior when ‘val' doesn’t have a number of qubits. If 'default' is not set, a TypeError is raised. If default is set to a value, that value is returned.

If 'val' has a '_num_qubits_' method and its result is not NotImplemented, that result is returned. Otherwise, if 'val' has a '_qid_shape_' method, the number of qubits is computed from the length of the shape and returned e.g. 'len(shape)'. If neither method returns a value other than NotImplemented and a default value was specified, the default value is returned.

the number of qubits, qudits, or qids 'val' operates on.

TypeError: ‘val' doesn’t have either a '_num_qubits_' or a '_qid_shape_' method (or they returned NotImplemented) and also no default value was specified.

henry090/Cirq documentation built on June 13, 2020, 1:28 a.m.