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qiskit.pulse.builder.num_qubits

num_qubits()[source]

Return number of qubits in the currently active backend.

Examples:

from qiskit import pulse
from qiskit.test.mock import FakeOpenPulse2Q

backend = FakeOpenPulse2Q()

with pulse.build(backend):
    print(pulse.num_qubits())
2

Note

Requires the active builder context to have a backend set.

Return type

int