corrected pytensor import

changed the import of `pytensor.tensor` to pt and corrected the following code

Author: Shayan-B

Chapter3_MCMC/Ch3_IntroMCMC_PyMC_current.ipynb

@@ -432,14 +432,14 @@
    ],
    "source": [
     "import pymc as pm\n",
-    "import pytensor.tensor as T\n",
+    "import pytensor.tensor as pt\n",
     "import pytensor\n",
     "\n",
     "\n",
     "with pm.Model() as model:\n",
     "    p1 = pm.Uniform('p', 0, 1)\n",
     "    p2 = 1 - p1\n",
-    "    p = T.stack([p1, p2])\n",
+    "    p = pt.stack([p1, p2])\n",
     "    assignment = pm.Categorical(\"assignment\", p, \n",
     "                                shape=data.shape[0],\n",
     "                                initval=np.random.randint(0, 2, data.shape[0]))\n",
@@ -1850,9 +1850,9 @@
  "metadata": {
   "anaconda-cloud": {},
   "kernelspec": {
-   "display_name": "pymc_env",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "pymc_env"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
@@ -1864,7 +1864,12 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.4"
+   "version": "3.7.8"
+  },
+  "vscode": {
+   "interpreter": {
+    "hash": "0a54084e6b208ee8d1ce3989ffc20924477a5f55f5a43e22e699a6741623861e"
+   }
   }
  },
  "nbformat": 4,