net = caffe.Net('imagenet.prototxt', 'imagenet.caffemodel', caffe.TEST)

conv_1_weights = old_net.params['conv1'][0].data
conv_1_biases = old_net.params['conv1'][1].data

conv_av_weights = np.mean(conv_1_weights, axis=1)

new_net = caffe.Net('new_network.prototxt', 'imagenet.caffemodel', caffe.TEST)

new_net.params['conv1'][0].data[...] = conv_av_weights
new_net.params['conv1'][1].data = conv_1_biases

new_net.save('newweights.caffemodel')