Code session 2

.gitignore

@@ -9,6 +9,8 @@
 *.dbf
 *.xlsx
 *.pickle
+*.shp
+*.shx
 .coverage
 data.*
 paris*.*

_doc/api/datasets.rst

@@ -5,6 +5,10 @@ Jeux de données
 Cartographie
 ============
 
+.. autofunction:: teachpyx.datasets.get_naturalearth_cities
+
+.. autofunction:: teachpyx.datasets.get_naturalearth_lowres
+
 .. autofunction:: teachpyx.datasets.load_enedis_dataset
 
 Classification

_doc/articles/2024/2024-11-31-route2024.rst

@@ -11,11 +11,15 @@ Séance 1
 Séance 2
 ++++++++
 
-Tests unitaires et classes
+Tests unitaires et classes toujours avec les dames
+
+:ref:`Prises aux dames <nbl-practice-py-base-dame_prise>`
 
 Séance 3
 ++++++++
 
+Héritage
+
 :ref:`classes pour représenter un graphe <nbl-practice-py-base-classe_tree>`
 
 Fin des classes puis :ref:`les itérateurs <nbl-practice-py-base-classe_iterateur>` et

_doc/practice/py-base/dame_prise.ipynb

@@ -26,9 +26,16 @@
     "Les valeurs numériques sont toujours plus efficace que des chaînes de caractères. Elles prennent moins de place en mémoire et les opérations sont plus efficaces."
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Partie I : sans les classes"
+   ]
+  },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [
     {
@@ -75,7 +82,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [
     {
@@ -84,7 +91,7 @@
        "[(0, 0), (4, 4), (4, 6)]"
       ]
      },
-     "execution_count": 6,
+     "execution_count": 2,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -114,7 +121,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 13,
+   "execution_count": 3,
    "metadata": {},
    "outputs": [
     {
@@ -183,7 +190,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 16,
+   "execution_count": 4,
    "metadata": {},
    "outputs": [
     {
@@ -213,7 +220,181 @@
   {
    "cell_type": "markdown",
    "metadata": {},
-   "source": []
+   "source": [
+    "## Partie 2 : Avec les classes\n",
+    "\n",
+    "Dans cette partie, on construit deux classes ``Coup`` et ``Damier`` avec pour objectif de déterminer si le fait de commencer est un avantage dans une partie où les deux joueurs jouent de façon aléatoire. Pour y répondre, il faut simuler un grand nombre de parties.\n",
+    "\n",
+    "La classe ``Coup`` contient au moins deux positions, celle de départ et celle d'arrivée. Elle peut en contenir plus si le pion ou la dame peut en prendre plusieurs."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[(0, 0), (3, 3)]\n"
+     ]
+    }
+   ],
+   "source": [
+    "class Coup:\n",
+    "\n",
+    "    def __init__(self, positions: list[tuple[int, int]]):\n",
+    "\n",
+    "        self.positions = positions\n",
+    "\n",
+    "    def __len__(self) -> int:\n",
+    "        \"Retourne le nombre de positions.\"\n",
+    "        return len(self.positions)\n",
+    "\n",
+    "    def __str__(self) -> str:\n",
+    "        \"Appelée implicitement par Python si print(c) où c est un Coup\"\n",
+    "        return str(self.positions)\n",
+    "\n",
+    "    def __getitem__(self, i):\n",
+    "        \"Donne un sens à c[0] où c est de type Coup.\"\n",
+    "        return self.positions[i]\n",
+    "\n",
+    "\n",
+    "# Vérification rapide.\n",
+    "c = Coup([(0, 0), (3, 3)])\n",
+    "print(c)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Maintenant le ``Damier``:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[[3 0 3 0 3 0 3 0 3 0]\n",
+      " [0 3 0 3 0 3 0 3 0 3]\n",
+      " [3 0 3 0 3 0 3 0 3 0]\n",
+      " [0 3 0 3 0 3 0 3 0 3]\n",
+      " [0 0 0 0 0 0 0 0 0 0]\n",
+      " [0 0 0 0 0 0 0 0 0 0]\n",
+      " [4 0 4 0 4 0 4 0 4 0]\n",
+      " [0 4 0 4 0 4 0 4 0 4]\n",
+      " [4 0 4 0 4 0 4 0 4 0]\n",
+      " [0 4 0 4 0 4 0 4 0 4]]\n"
+     ]
+    }
+   ],
+   "source": [
+    "class Damier:\n",
+    "\n",
+    "    def __init__(self, N: int = 10):\n",
+    "\n",
+    "        self.damier = np.zeros((N, N), dtype=int)\n",
+    "\n",
+    "    def __str__(self) -> str:\n",
+    "        \"Appelée implicitement par Python si print(c) où c est un Coup\"\n",
+    "        return str(self.damier)\n",
+    "\n",
+    "    def __len__(self) -> int:\n",
+    "        \"Retourne la dimension du damier.\"\n",
+    "        return len(self.damier)\n",
+    "\n",
+    "    def init(self):\n",
+    "        \"Initialise le damier pour un début de partie.\"\n",
+    "        N = len(self)\n",
+    "        for i in range(N):\n",
+    "            if i in ((N - 1) // 2, N // 2):\n",
+    "                continue\n",
+    "            c = 3 if i < N // 2 else 4\n",
+    "            for j in range(N):\n",
+    "                if (i + j) % 2 == 0:\n",
+    "                    self.damier[i, j] = c\n",
+    "\n",
+    "    def joue(self, coup: Coup):\n",
+    "        \"Joue un coup. On suppose que celui-ci est valide.\"\n",
+    "        for i in range(1, len(coup)):\n",
+    "            self.annule(coup[i - 1], coup[i])\n",
+    "        self.damier[coup[1]] = self.damier[coup[0]]\n",
+    "        self.damier[coup[0]] = 0\n",
+    "\n",
+    "    def annule(self, p1: tuple[int, int], p2: tuple[int, int]):\n",
+    "        \"Annule toutes les cases du damier entre deux positions.\"\n",
+    "        di = (p2[0] - p1[0]) // abs(p2[0] - p1[0])\n",
+    "        dj = (p2[1] - p1[1]) // abs(p2[1] - p1[1])\n",
+    "        for k in range(1, abs(p2[0] - p1[0])):\n",
+    "            self.damier[p1[0] + di * k, p1[1] + dj * k] = 0\n",
+    "\n",
+    "\n",
+    "d = Damier()\n",
+    "d.init()\n",
+    "print(d)  # équivalent à print(d.__str__())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "On écrit un test unitaire pour vérifier que la méthode ``init`` est valide."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def test_init():\n",
+    "    d = Damier(4)\n",
+    "    d.init()\n",
+    "    assert d.damier.tolist() == [\n",
+    "        [3, 0, 3, 0],\n",
+    "        [0, 0, 0, 0],\n",
+    "        [0, 0, 0, 0],\n",
+    "        [0, 4, 0, 4],\n",
+    "    ], f\"{d.damier.tolist()}\"\n",
+    "\n",
+    "\n",
+    "test_init()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "On fait de même pour la méthode ``joue``."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def test_coup():\n",
+    "    d = Damier(4)\n",
+    "    d.init()\n",
+    "    d.joue(Coup([(0, 0), (1, 1)]))\n",
+    "    assert d.damier.tolist() == [\n",
+    "        [0, 0, 3, 0],\n",
+    "        [0, 3, 0, 0],\n",
+    "        [0, 0, 0, 0],\n",
+    "        [0, 4, 0, 4],\n",
+    "    ], f\"{d.damier.tolist()}\"\n",
+    "\n",
+    "\n",
+    "test_coup()"
+   ]
   }
  ],
  "metadata": {

_unittests/ut_datasets/test_gpd_helper.py

@@ -0,0 +1,19 @@
+import unittest
+from teachpyx.ext_test_case import ExtTestCase
+from teachpyx.datasets import get_naturalearth_cities, get_naturalearth_lowres
+
+
+class TestGpdHelper(ExtTestCase):
+    def test_get_naturalearth_cities(self):
+        filenames = get_naturalearth_cities()
+        for filename in filenames:
+            self.assertExists(filename)
+
+    def test_get_naturalearth_lowres(self):
+        filenames = get_naturalearth_lowres()
+        for filename in filenames:
+            self.assertExists(filename)
+
+
+if __name__ == "__main__":
+    unittest.main()

teachpyx/datasets/__init__.py

@@ -13,3 +13,5 @@
 # from .titanic import load_titanic_dataset
 # from .tweets import load_tweet_dataset
 from .wines import load_wines_dataset, load_wine_dataset
+
+from .gpd_helper import get_naturalearth_cities, get_naturalearth_lowres

teachpyx/datasets/gpd_helper.py

@@ -0,0 +1,31 @@
+from ..tools.data_helper import download
+
+
+def get_naturalearth_cities(dest: str = ".", timeout: int = 10, verbose: bool = False):
+    """
+    Retrieves file ``naturalearth_cities.shp``, ``naturalearth_cities.shx``,
+    ``naturalearth_cities.dbf`` in
+    `teachdata/geopandas/data/naturalearth_cities/
+    <https://github.com/sdpython/teachdata/blob/main/geopandas/data/naturalearth_cities/>`_.
+    """
+    urls = [
+        "https://github.com/sdpython/teachdata/raw/main/geopandas/data/naturalearth_cities/naturalearth_cities.shp",
+        "https://github.com/sdpython/teachdata/raw/main/geopandas/data/naturalearth_cities/naturalearth_cities.shx",
+        "https://github.com/sdpython/teachdata/raw/main/geopandas/data/naturalearth_cities/naturalearth_cities.dbf",
+    ]
+    return [download(url, dest=dest, timeout=timeout, verbose=verbose) for url in urls]
+
+
+def get_naturalearth_lowres(dest: str = ".", timeout: int = 10, verbose: bool = False):
+    """
+    Retrieves files ``naturalearth_lowres.shp``, ``naturalearth_lowres.shx``,
+    ``naturalearth_lowres.dbf`` in
+    `teachdata/geopandas/data/naturalearth_lowres/
+    <https://github.com/sdpython/teachdata/blob/main/geopandas/data/naturalearth_lowres/>`_.
+    """
+    urls = [
+        "https://github.com/sdpython/teachdata/raw/main/geopandas/data/naturalearth_lowres/naturalearth_lowres.shp",
+        "https://github.com/sdpython/teachdata/raw/main/geopandas/data/naturalearth_lowres/naturalearth_lowres.shx",
+        "https://github.com/sdpython/teachdata/raw/main/geopandas/data/naturalearth_lowres/naturalearth_lowres.dbf",
+    ]
+    return [download(url, dest=dest, timeout=timeout, verbose=verbose) for url in urls]

teachpyx/tools/data_helper.py

@@ -41,6 +41,32 @@ def decompress_zip(filename, dest: str, verbose: bool = False) -> List[str]:
     return files
 
 
+def download(
+    url: str, dest: str = ".", timeout: int = 10, verbose: bool = False
+) -> str:
+    """
+    Download one file.
+
+    :param url: url
+    :param dest: destination folder
+    :param timeout: timeout
+    :param verbose: display progress
+    :return: filename
+    """
+    filename = url.split("/")[-1]
+    dest_zip = os.path.join(dest, filename)
+    if not os.path.exists(dest_zip):
+        if verbose:
+            print(f"downloads into {dest_zip!r} from {url!r}")
+        with urlopen(url, timeout=timeout) as u:
+            content = u.read()
+        with open(dest_zip, "wb") as f:
+            f.write(content)
+    elif verbose:
+        print(f"already downloaded {dest_zip!r}")
+    return dest_zip
+
+
 def download_and_unzip(
     url: str, dest: str = ".", timeout: int = 10, verbose: bool = False
 ) -> List[str]: