onnxruntime/python/_downloads/plot_load_and_predict.ipynb

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    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
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      "source": [
        "%matplotlib inline"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "\n\nLoad and predict with ONNX Runtime and a very simple model\n==========================================================\n\nThis example demonstrates how to load a model and compute\nthe output for an input vector. It also shows how to\nretrieve the definition of its inputs and outputs.\n\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "import onnxruntime as rt\nimport numpy\nfrom onnxruntime.datasets import get_example"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "Let's load a very simple model.\nThe model is available on github `onnx...test_sigmoid <https://github.com/onnx/onnx/tree/master/onnx/backend/test/data/node/test_sigmoid>`_.\n\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "example1 = get_example(\"sigmoid.onnx\")\nsess = rt.InferenceSession(example1)"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "Let's see the input name and shape.\n\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "input_name = sess.get_inputs()[0].name\nprint(\"input name\", input_name)\ninput_shape = sess.get_inputs()[0].shape\nprint(\"input shape\", input_shape)\ninput_type = sess.get_inputs()[0].type\nprint(\"input type\", input_type)"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "Let's see the output name and shape.\n\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "output_name = sess.get_outputs()[0].name\nprint(\"output name\", output_name)  \noutput_shape = sess.get_outputs()[0].shape\nprint(\"output shape\", output_shape)\noutput_type = sess.get_outputs()[0].type\nprint(\"output type\", output_type)"
      ]
    },
    {
      "cell_type": "markdown",
      "metadata": {},
      "source": [
        "Let's compute its outputs (or predictions if it is a machine learned model).\n\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
        "collapsed": false
      },
      "outputs": [],
      "source": [
        "import numpy.random\nx = numpy.random.random((3,4,5))\nx = x.astype(numpy.float32)\nres = sess.run([output_name], {input_name: x})\nprint(res)"
      ]
    }
  ],
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