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---
title: update_u_gates (v0.29)
description: API reference for qiskit.ignis.characterization.update_u_gates in qiskit v0.29
in_page_toc_min_heading_level: 1
python_api_type: function
python_api_name: qiskit.ignis.characterization.update_u_gates
---
<span id="qiskit-ignis-characterization-update-u-gates" />
# qiskit.ignis.characterization.update\_u\_gates
<Function id="qiskit.ignis.characterization.update_u_gates" isDedicatedPage={true} github="https://github.com/qiskit-community/qiskit-ignis/tree/stable/0.6/qiskit/ignis/characterization/calibrations/ibmq_utils.py" signature="update_u_gates(drag_params, pi2_pulse_schedules=None, qubits=None, inst_map=None, drives=None)">
Update the cmd\_def with new single qubit gate values
Will update U2, U3
**Parameters**
* **drag\_params** (*list*) list of drag params
* **pi2\_pulse\_schedules** (*list*) list of new pi/2 gate as a pulse schedule will use the drag\_params if this is None.
* **qubits** (*list*) list of qubits to update
* **inst\_map** ([*InstructionScheduleMap*](qiskit.pulse.InstructionScheduleMap "qiskit.pulse.InstructionScheduleMap")) InstructionScheduleMap providing circuit instruction to schedule definitions.
* **drives** (*list*) List of drive chs
</Function>