_base_ = [
    '../_base_/models/retinanet_r50_fpn.py',
    '../_base_/datasets/voc0712.py',
    '../_base_/schedules/schedule.py', '../_base_/default_runtime.py'
]
# optimizer
optimizer = dict(type='SGD', lr=0.01, momentum=0.9, weight_decay=0.0001)

model = dict(
    bbox_head=dict(
        num_classes=20,
    ),
)
