43 lines
1.3 KiB
Plaintext
43 lines
1.3 KiB
Plaintext
---
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title: pad
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description: API reference for qiskit.pulse.builder.pad
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in_page_toc_min_heading_level: 1
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python_api_type: function
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python_api_name: qiskit.pulse.builder.pad
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---
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# qiskit.pulse.builder.pad
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<Function id="qiskit.pulse.builder.pad" isDedicatedPage={true} github="https://github.com/qiskit/qiskit/tree/stable/0.17/qiskit/pulse/builder.py" signature="pad(*chs)">
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Pad all available timeslots with delays upon exiting context.
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**Parameters**
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**chs** ([`Channel`](qiskit.pulse.channels#channel "qiskit.pulse.channels.Channel")) – Channels to pad with delays. Defaults to all channels in context if none are supplied.
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Examples:
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```python
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from qiskit import pulse
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d0 = pulse.DriveChannel(0)
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d1 = pulse.DriveChannel(1)
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with pulse.build() as pulse_prog:
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with pulse.pad():
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with pulse.align_right():
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# this pulse will start at t=0
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pulse.play(pulse.Constant(100, 1.0), d0)
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# this pulse will start at t=80
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# a delay will be inserted from t=0 to t=80
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pulse.play(pulse.Constant(20, 1.0), d1)
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assert pulse_prog.ch_start_time(d0) == pulse_prog.ch_start_time(d1)
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assert pulse_prog.ch_stop_time(d0) == pulse_prog.ch_stop_time(d1)
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```
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**Return type**
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`AbstractContextManager`\[`None`]
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</Function>
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