* rm .py files

* add tutorial extra download for colab

Author: dario-coscia

tutorials/TUTORIAL_GUIDELINES.md

@@ -56,7 +56,7 @@ except:
     IN_COLAB = False
 
 if IN_COLAB:
-    !pip install "pina-mathlab"
+    !pip install "pina-mathlab[tutorial]"
 
 import torch                        # if used
 import matplotlib.pyplot as plt     # if used

tutorials/tutorial1/tutorial.ipynb

@@ -26,7 +26,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": null,
    "id": "86478a84",
    "metadata": {},
    "outputs": [],
@@ -39,7 +39,7 @@
     "except:\n",
     "    IN_COLAB = False\n",
     "if IN_COLAB:\n",
-    "    !pip install \"pina-mathlab\"\n",
+    "    !pip install \"pina-mathlab[tutorial]\"\n",
     "\n",
     "import warnings\n",
     "import torch\n",

tutorials/tutorial1/tutorial.py

@@ -16,7 +16,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -28,7 +28,7 @@
     "except:\n",
     "    IN_COLAB = False\n",
     "if IN_COLAB:\n",
-    "    !pip install \"pina-mathlab\"\n",
+    "    !pip install \"pina-mathlab[tutorial]\"\n",
     "    # get the data\n",
     "    !mkdir \"data\"\n",
     "    !wget \"https://github.com/mathLab/PINA/raw/refs/heads/master/tutorials/tutorial10/data/Data_KS.mat\" -O \"data/Data_KS.mat\"\n",