Blender でボタンを横に並べる

expand.py

import bpy

class UI(bpy.types.Panel):
  bl_label = "my panel"
  bl_space_type = "VIEW_3D"
  bl_region_type = "UI"
 
#############################################
  def draw(self, context):
    layout = self.layout
    row = layout.row(align=True)
    row.alignment = 'EXPAND'
    row.operator("my.button", text="1")
    row.operator("my.button", text="2")
    row.operator("my.button", text="3")
#############################################

class MyButton(bpy.types.Operator):
  bl_idname = "my.button"
  bl_label = "text"
  
  def execute(self, context):
    print("pushed")
    return{'FINISHED'}
    
classes = (
  UI,
  MyButton
)

for cls in classes:
  bpy.utils.register_class(cls)
  
''' 登録を解除する場合
for cls in reversed(classes):
  bpy.utils.unregister_class(cls)
'''