###该操作 需要 graphviz和pydot的支持
一:左->右
sudo python /home/marry/caffe/python/draw_net.py /home/marry/caffe/examples/mnist/A_my_lenet.prototxt /home/marry/caffe/examples/mnist/lenet.jpg --rankdir=LR
二:下->上
sudo python /home/marry/caffe/python/draw_net.py /home/marry/caffe/examples/mnist/A_my_lenet.prototxt /home/marry/caffe/examples/mnist/lenet.jpg --rankdir=BT
三:上->下
sudo python /home/marry/caffe/python/draw_net.py /home/marry/caffe/examples/mnist/A_my_lenet.prototxt /home/marry/caffe/examples/mnist/lenet.jpg --rankdir=TB
四:右->左
sudo python /home/marry/caffe/python/draw_net.py /home/marry/caffe/examples/mnist/A_my_lenet.prototxt /home/marry/caffe/examples/mnist/lenet.jpg --rankdir=RL