{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[ 1,  2,  3,  7,  8,  9, 10]])"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "import numpy as np\n",
    "\n",
    "state = np.array([[1,2,3],[1,2,3]])\n",
    "aaa = np.array([[123]])\n",
    "\n",
    "state[:,-1]\n",
    "\n",
    "np.append([[1, 2, 3]], [[7, 8, 9, 10]], axis=1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import tensorflow as tf\n",
    "import numpy as np\n",
    "\n",
    "aa = tf.constant([[1,2,3],[1,2,3],[1,2,3],[1,2,3]])\n",
    "bb = tf.constant([1,2,3,4])\n",
    "\n",
    "print(tf.expand_dims(bb,axis=1))\n",
    "\n",
    "cc = tf.math.multiply(aa,tf.expand_dims(bb,axis = 1))\n",
    "\n",
    "print(cc)\n",
    "print(tf.shape(aa))\n",
    "\n",
    "print(aa[:,2:3])\n",
    "\n",
    "aa = tf.constant([1.0,2.0,3.0,np.nan])\n",
    "print(np.any(tf.math.is_nan(aa)))\n",
    "if np.any(tf.math.is_nan(aa)):\n",
    "    print('true')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import tensorflow as tf\n",
    "\n",
    "prob = tf.constant([0.3,0.3,0.])\n",
    "\n",
    "entropy = tf.reduce_mean(tf.math.negative(tf.math.multiply(prob,tf.math.log(prob))))\n",
    "\n",
    "print(entropy)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "int 23\n",
      "str twenty three\n",
      "bool True\n",
      "error\n"
     ]
    }
   ],
   "source": [
    "from functools import singledispatchmethod\n",
    "class person:\n",
    "    @singledispatchmethod\n",
    "    def age(self,arg):\n",
    "        print(\"error\")\n",
    "    @age.register(int)\n",
    "    def _(self,arg:int):\n",
    "        print(\"int\",arg)\n",
    "    @age.register(str)\n",
    "    def _(self,arg:str):\n",
    "        print(\"str\",arg)\n",
    "    @age.register(bool)\n",
    "    def _(self,arg:bool):\n",
    "        print(\"bool\",arg)\n",
    "\n",
    "p = person()\n",
    "p.age(23)  # int\n",
    "p.age('twenty three')  # str\n",
    "p.age(True)  # bool\n",
    "p.age(['23'])  # list\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import tensorflow as tf\n",
    "import tensorflow.keras.layers as layers\n",
    "\n",
    "def conv_bn_relu(inputs, chs, reps):\n",
    "    x = inputs\n",
    "    for i in range(reps):\n",
    "        x = layers.Conv2D(chs, 3, padding=\"same\")(x)\n",
    "        x = layers.BatchNormalization()(x)\n",
    "        x = layers.ReLU()(x)\n",
    "    return x\n",
    "\n",
    "def create_model():\n",
    "    inputs = layers.Input((32, 32, 3))\n",
    "    x = conv_bn_relu(inputs, 64, 3)\n",
    "    x = layers.AveragePooling2D(2)(x)\n",
    "    x = conv_bn_relu(x, 128, 3)\n",
    "    x = layers.AveragePooling2D(2)(x)\n",
    "    x = conv_bn_relu(x, 256, 3)\n",
    "    x = layers.GlobalAveragePooling2D()(x)\n",
    "    x = layers.Dense(10, activation=\"softmax\")(x)\n",
    "    return tf.keras.models.Model(inputs, x)\n",
    "\n",
    "def perprocess(img, label):\n",
    "    img = tf.cast(img, tf.float32) / 255.0\n",
    "    label = tf.cast(label, tf.float32)\n",
    "    return img, label\n",
    "\n",
    "def train():\n",
    "    (X_train, y_train), (X_test, y_test) = tf.keras.datasets.cifar10.load_data()\n",
    "    trainset = tf.data.Dataset.from_tensor_slices((X_train, y_train)\n",
    "        ).map(perprocess).shuffle(4096).batch(128).repeat().prefetch(50)\n",
    "\n",
    "    model = create_model()\n",
    "    model.compile(\"adam\", \"sparse_categorical_crossentropy\", [\"acc\"])\n",
    "\n",
    "    model.fit(trainset, steps_per_epoch=50000//128, epochs=1)        \n",
    "    # 'Adam/conv2d/kernel/m:0' shape=(3, 3, 3, 64) \n",
    "    print(model.optimizer.weights[1][0, 0, 0,:10])\n",
    "    # <tf.Variable 'conv2d/kernel:0' shape=(3, 3, 3, 64)\n",
    "    print(model.weights[0][0, 0, 0,:10])\n",
    "\n",
    "    model.save_weights(\"model_tf.ckpt\", save_format=\"tf\")  # デフォルト\n",
    "    model.save_weights(\"model_h5.h5\", save_format=\"h5\")  "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "390/390 [==============================] - 28s 59ms/step - loss: 1.2548 - acc: 0.5441\n",
      "tf.Tensor(\n",
      "[ 0.00190057 -0.00765918  0.00163367  0.00782851  0.02600338  0.00516749\n",
      " -0.00424899  0.01562062 -0.0022073  -0.00355565], shape=(10,), dtype=float32)\n",
      "tf.Tensor(\n",
      "[ 0.07978954 -0.04595745 -0.03745254 -0.03701654  0.03296526 -0.11328737\n",
      " -0.10719797  0.00874998  0.0226855   0.02288487], shape=(10,), dtype=float32)\n"
     ]
    }
   ],
   "source": [
    "train()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "tf.Tensor(\n",
      "[ 0.07978954 -0.04595745 -0.03745254 -0.03701654  0.03296526 -0.11328737\n",
      " -0.10719797  0.00874998  0.0226855   0.02288487], shape=(10,), dtype=float32)\n",
      "tf.Tensor(\n",
      "[ 0.00190057 -0.00765918  0.00163367  0.00782851  0.02600338  0.00516749\n",
      " -0.00424899  0.01562062 -0.0022073  -0.00355565], shape=(10,), dtype=float32)\n"
     ]
    }
   ],
   "source": [
    "def load_tf_w_zero_grad():\n",
    "    model = create_model()\n",
    "    model.compile(\"adam\", \"sparse_categorical_crossentropy\", [\"acc\"])\n",
    "\n",
    "    zero_grad = [tf.zeros_like(x) for x in model.weights]\n",
    "    model.optimizer.apply_gradients(zip(zero_grad, model.weights))\n",
    "\n",
    "    model.load_weights(\"model_tf.ckpt\")\n",
    "    # これでようやくオプティマイザーの値も同一になる\n",
    "    print(model.weights[0][0, 0, 0,:10])\n",
    "    print(model.optimizer.weights[1][0, 0, 0,:10])\n",
    "load_tf_w_zero_grad()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 20,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "import numpy as np\n",
    "\n",
    "a = np.array([10,20,30,0])\n",
    "\n",
    "np.any(a == 0)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "4"
      ]
     },
     "execution_count": 29,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "asd = \"adsf\"\n",
    "len(asd)"
   ]
  }
 ],
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