configure_two_session_tf_keras.py

#### KERAS ####
import tensorflow as tf
from keras.backend.tensorflow_backend import set_session
config = tf.ConfigProto()
config.gpu_options.per_process_gpu_memory_fraction = 0.3
set_session(tf.Session(config=config))

#### TF ####
config = tf.ConfigProto(
    gpu_options = tf.GPUOptions(per_process_gpu_memory_fraction=0.5),
    device_count = {'GPU': 1}
)

sess_1 = tf.Session(graph=graph_1, config=config)
sess_2 = tf.Session(graph=graph_2, config=config)