TinyGrad_demo.ipynb

{
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  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "from visual import *\n",
    "from core import Parameter\n",
    "from nn import *\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Parameter: 9| Grad: 1.0 | Children: {Parameter: 3| Grad: 1.0 | Children: set(), Parameter: 6| Grad: 1.0 | Children: {Parameter: 2| Grad: 3.0 | Children: set(), Parameter: 3| Grad: 2.0 | Children: set()}}\n"
     ]
    }
   ],
   "source": [
    "a = Parameter(2)\n",
    "b = 3\n",
    "c = b+a*b\n",
    "\n",
    "c.backward()\n",
    "print(c)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Parameter: 2| Grad: 0.0 | Children: set()\n",
      "Parameter: 5| Grad: 0.0 | Children: {Parameter: 3| Grad: 0.0 | Children: set(), Parameter: 2| Grad: 0.0 | Children: set()}\n",
      "Parameter: 5| Grad: 0.0 | Children: {Parameter: 3| Grad: 0.0 | Children: set(), Parameter: 2| Grad: 0.0 | Children: set()}\n",
      "Parameter: 6| Grad: 0.0 | Children: {Parameter: 2| Grad: 0.0 | Children: set(), Parameter: 3| Grad: 0.0 | Children: set()}\n",
      "Parameter: 6| Grad: 0.0 | Children: {Parameter: 3| Grad: 0.0 | Children: set(), Parameter: 2| Grad: 0.0 | Children: set()}\n",
      "Parameter: -1| Grad: 0.0 | Children: {Parameter: 2| Grad: 0.0 | Children: set(), Parameter: -3| Grad: 0.0 | Children: set()}\n",
      "Parameter: 1| Grad: 0.0 | Children: {Parameter: -2| Grad: 0.0 | Children: {Parameter: 2| Grad: 0.0 | Children: set(), Parameter: -1| Grad: 0.0 | Children: set()}, Parameter: 3| Grad: 0.0 | Children: set()}\n",
      "Parameter: 0.6666666666666666| Grad: 0.0 | Children: {Parameter: 2| Grad: 0.0 | Children: set(), Parameter: 0.3333333333333333| Grad: 0.0 | Children: set()}\n",
      "Parameter: 1.5| Grad: 0.0 | Children: {Parameter: 0.5| Grad: 0.0 | Children: {Parameter: 2| Grad: 0.0 | Children: set()}, Parameter: 3| Grad: 0.0 | Children: set()}\n",
      "Parameter: -2| Grad: 0.0 | Children: {Parameter: -1| Grad: 0.0 | Children: set(), Parameter: 2| Grad: 0.0 | Children: set()}\n",
      "-3\n",
      "Parameter: 0.25| Grad: 0.0 | Children: {Parameter: 2| Grad: 0.0 | Children: set()}\n"
     ]
    }
   ],
   "source": [
    "# Tests\n",
    "a = Parameter(2)\n",
    "b = 3\n",
    "c = a+b\n",
    "print(a)\n",
    "print(c)\n",
    "d = b+a\n",
    "print(d)\n",
    "e = a*b\n",
    "print(e)\n",
    "f = b*a\n",
    "print(f)\n",
    "g = a-b\n",
    "print(g)\n",
    "h = b-a\n",
    "print(h)\n",
    "i = a/b\n",
    "print(i)\n",
    "l = b/a\n",
    "print(l)\n",
    "m = -a\n",
    "n = -b\n",
    "print(m)\n",
    "print(n)\n",
    "o = (a**-2)\n",
    "print(o)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
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    "draw_dot(c)"
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   "cell_type": "code",
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    "c.backward()\n",
    "draw_dot(c)"
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   "cell_type": "code",
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   "source": [
    "f.backward()\n",
    "draw_dot(f)"
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   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
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     "text": [
      "Parameter: 0.761594155955765| Grad: 0.0 | Children: {Parameter: 1| Grad: 0.0 | Children: {Parameter: -2| Grad: 0.0 | Children: {Parameter: 2| Grad: 4.0 | Children: set(), Parameter: -1| Grad: 0.0 | Children: set()}, Parameter: 3| Grad: 0.0 | Children: set()}}\n"
     ]
    }
   ],
   "source": [
    "z = h.tanh()\n",
    "print(z)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
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    "z.backward()\n",
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      "Tanh_Neuron(4)\n"
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     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
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   ],
   "source": [
    "n = Neuron(4, act=\"tanh\")\n",
    "print(n)\n",
    "dataset_x = [Parameter(1),Parameter(2),Parameter(3),Parameter(4)]\n",
    "y = n(dataset_x)\n",
    "y.backward()\n",
    "w = draw_dot(y)\n",
    "w"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
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    "# MLP has in input the number of inputs after we have a list containing the number of neurons one for each layer, \n",
    "# then a list of different activation function one for each layer, None for linear layer \n",
    "m = MLP(2, [4, 2, 1], [\"relu\"])\n",
    "print(m)\n",
    "dataset_x = [1, 2]\n",
    "#dataset_x = [Parameter(1),Parameter(2)]\n",
    "out = m(dataset_x)\n",
    "out.backward()\n",
    "draw_dot(out)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
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    }
   ],
   "source": [
    "class Neuron(Module):\n",
    "    def __init__(self, number_of_inputs, weights, act=None):\n",
    "        self.w = [Parameter(w) for w in weights[0:2]]\n",
    "        self.b = Parameter(weights[2])\n",
    "        self.act = act\n",
    "\n",
    "    def __call__(self, x):\n",
    "        out = sum((wi * xi for wi, xi in zip(self.w, x)), start=self.b)\n",
    "        return (\n",
    "            out.relu()\n",
    "            if self.act == \"relu\"\n",
    "            else out.tanh()\n",
    "            if self.act == \"tanh\"\n",
    "            else out.sigmoid()\n",
    "            if self.act == \"sigmoid\"\n",
    "            else out.lrelu()\n",
    "            if self.act == \"lrelu\"\n",
    "            else out.c_softplus()\n",
    "            if self.act == \"c_softplus\"\n",
    "            else out.elu()\n",
    "            if self.act == \"elu\"\n",
    "            else out\n",
    "        )\n",
    "\n",
    "    def parameters(self):\n",
    "        return self.w + [self.b]\n",
    "\n",
    "    def __repr__(self):\n",
    "        act = (\n",
    "            \"ReLU\"\n",
    "            if self.act == \"relu\"\n",
    "            else \"Tanh\"\n",
    "            if self.act == \"tanh\"\n",
    "            else \"Sigmoid\"\n",
    "            if self.act == \"sigmoid\"\n",
    "            else \"LReLU\"\n",
    "            if self.act == \"lrelu\"\n",
    "            else \"c_softplus\"\n",
    "            if self.act == \"c_softplus\"\n",
    "            else \"elu\"\n",
    "            if self.act == \"elu\"\n",
    "            else \"Linear\"\n",
    "        )\n",
    "        return f\"{act}_Neuron({len(self.w)})\"\n",
    "\n",
    "h1 = Neuron(2, [0.15, 0.25, 0.35], act=\"sigmoid\")\n",
    "h2 = Neuron(2, [0.2, 0.3, 0.35], act=\"sigmoid\")\n",
    "input = [Parameter(0.05), Parameter(0.1)]\n",
    "a=h1(input)\n",
    "b=h2(input)\n",
    "\n",
    "o1 = Neuron(2, [0.4, 0.5, 0.6] ,act=\"sigmoid\")\n",
    "o2 = Neuron(2, [0.45, 0.55, 0.6], act=\"sigmoid\")\n",
    "input = [a,b]\n",
    "c=o1(input)\n",
    "d=o2(input)\n",
    "\n",
    "target = [0.01, 0.99]\n",
    "loss = sum((t - o) ** 2 for t, o in zip(target, [c, d])) / len(input)\n",
    "loss.backward()\n",
    "draw_dot(loss)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [],
   "source": [
    "for x in [h1,h2,o1,o2]:\n",
    "    for p in x.parameters():\n",
    "        p.data += - 0.3 * p.grad"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [],
   "source": [
    "c=o1(input)\n",
    "d=o2(input)\n",
    "\n",
    "target = [0.01, 0.99]\n",
    "loss = sum((t - o) ** 2 for t, o in zip(target, [c, d])) / len(input)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
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     "execution_count": 16,
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   ],
   "source": [
    "import random\n",
    "# MLP has in input the number of inputs after we have a list containing the number of neurons one for each layer, \n",
    "# then a list of different activation function one for each layer, None for linear layer \n",
    "\n",
    "m = MLP(2, [4, 2, 1], [\"relu\"], random.gauss) # this support only distribution with 2 params for now (like mu and sigma) \n",
    "print(m)\n",
    "dataset_x = [1, 2]\n",
    "#dataset_x = [Parameter(1),Parameter(2)]\n",
    "out = m(dataset_x)\n",
    "out.backward()\n",
    "draw_dot(out)\n"
   ]
  }
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