设置占用显存大小&&显存动态增长

# 设置占用显存大小
from keras.backend.tensorflow_backend import set_session
config = tf.ConfigProto()
config.gpu_options.per_process_gpu_memory_fraction = 0.1
set_session(tf.Session(config=config))

import keras.backend.tensorflow_backend as KTF
import tensorflow as tf
config = tf.ConfigProto()
config.gpu_options.allow_growth=True  
sess = tf.Session(config=config)
KTF.set_session(sess)