qiskit.pulse.builder.build

build(backend=None, schedule=None, name=None, default_alignment='left', default_transpiler_settings=None, default_circuit_scheduler_settings=None)

Create a context manager for launching the imperative pulse builder DSL.

To enter a building context and starting building a pulse program:

from qiskit import execute, pulse
from qiskit.providers.fake_provider import FakeOpenPulse2Q
 
backend = FakeOpenPulse2Q()
 
d0 = pulse.DriveChannel(0)
 
with pulse.build() as pulse_prog:
    pulse.play(pulse.Constant(100, 0.5), d0)

While the output program pulse_prog cannot be executed as we are using a mock backend. If a real backend is being used, executing the program is done with:

qiskit.execute(pulse_prog, backend)

Parameters

• backend (Backend) – A Qiskit backend. If not supplied certain builder functionality will be unavailable.
• schedule (ScheduleBlock | None) – A pulse ScheduleBlock in which your pulse program will be built.
• name (str | None) – Name of pulse program to be built.
• default_alignment (str | AlignmentKind | None) – Default scheduling alignment for builder. One of left, right, sequential or an alignment context.
• default_transpiler_settings (Dict[str, Any] | None) – Default settings for the transpiler.
• default_circuit_scheduler_settings (Dict[str, Any] | None) – Default settings for the circuit to pulse scheduler.

Returns

A new builder context which has the active builder initialized.

Return type

AbstractContextManager[ScheduleBlock]