change pixel values on mouse clicks

pixel_click.ipynb

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   "source": [
    "# %pip install ipympl\n",
    "\n",
    "import numpy as np\n",
    "import matplotlib.pyplot as plt\n",
    "from ipywidgets import interact, Output\n",
    "from IPython.display import display\n",
    "\n",
    "%matplotlib widget\n",
    "\n",
    "def f(i, j, img):\n",
    "    print(f\"Clicked on pixel: ({i}, {j})\")\n",
    "    img[i, j] = [1, 0, 0]  # Set pixel to red. Modify as needed.\n",
    "    return img\n",
    "\n",
    "img = np.random.rand(20, 20, 3)  # 100x100 RGB image. Modify as needed.\n",
    "\n",
    "fig, ax = plt.subplots()\n",
    "ax.imshow(img)\n",
    "\n",
    "output = Output()\n",
    "\n",
    "def onclick(event):\n",
    "    if event.inaxes == ax:\n",
    "        i, j = int(round(event.ydata)), int(round(event.xdata))\n",
    "        with output:\n",
    "            global img\n",
    "            img = f(i, j, img)  \n",
    "            ax.imshow(img)  \n",
    "            fig.canvas.draw()  \n",
    "\n",
    "cid = fig.canvas.mpl_connect('button_press_event', onclick)\n",
    "\n",
    "plt.show()\n",
    "\n",
    "display(output)"
   ]
  }
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