Stackoverflow: Connecting two graphs

Untitled.ipynb

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      "[4.0]\n"
     ]
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   "source": [
    "import tensorflow as tf\n",
    "FLOAT = tf.float32\n",
    "tf.reset_default_graph()\n",
    "\n",
    "def graph_1():\n",
    "    g = tf.Graph()\n",
    "    with g.as_default():\n",
    "        x = tf.placeholder(FLOAT, [], name='x')\n",
    "        y = tf.multiply(2.0, x, name='y')\n",
    "    return g\n",
    "\n",
    "def graph_2():\n",
    "    g = tf.Graph()\n",
    "    with g.as_default():\n",
    "        a = tf.placeholder(FLOAT, [], name='a')\n",
    "        b = tf.multiply(2.0, a, name='b')\n",
    "    return g\n",
    "\n",
    "# x = 1.0\n",
    "x = tf.constant(1.0, FLOAT, [])\n",
    "# feed x to graph_1 -> y = 2.0\n",
    "g1 = graph_1()\n",
    "[g1_y] = tf.import_graph_def(g1.as_graph_def(), input_map={'x': x}, return_elements=['y:0'])\n",
    "# feed y to graph_2 -> b = 4.0\n",
    "g2 = graph_2()\n",
    "[g2_b] = tf.import_graph_def(g2.as_graph_def(), input_map={'a': g1_y}, return_elements=['b:0'])\n",
    "\n",
    "config = tf.ConfigProto()\n",
    "config.gpu_options.allow_growth = True\n",
    "with tf.Session(config=config) as sess:\n",
    "    print(sess.run([g2_b]))"
   ]
  }
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