train.py: error: unrecognized arguments: --multi-gpu 2

[HuangQinJian]

I use
python keras_retinanet/bin/train.py csv keras_retinanet/CSV/annotations.csv keras_retinanet/CSV/classes.csv --multi-gpu 2

Then error arose:
train.py: error: unrecognized arguments: --multi-gpu 2

[hgaiser]

Every argument after csv is handled by the csv argument parser, --multi-gpu needs to be passed before csv. Also, multi-gpu training in Keras is a bit sketchy in my opinion, use it at your own risk ;)