Bump Python in Colab to 3.9.

PiperOrigin-RevId: 515639889
Change-Id: If06429d31e0b82986436d747bf05ef95f8ec91fb

notebooks/AlphaFold.ipynb

@@ -110,7 +110,7 @@
         "      %env PATH=/opt/conda/bin:{PATH}\n",
         "      %shell conda install -qy conda==4.13.0 \\\n",
         "          \u0026\u0026 conda install -qy -c conda-forge \\\n",
-        "            python=3.8 \\\n",
+        "            python=3.9 \\\n",
         "            openmm=7.5.1 \\\n",
         "            pdbfixer\n",
         "      pbar.update(80)\n",
@@ -161,15 +161,15 @@
         "      pbar.update(10)\n",
         "\n",
         "      # Apply OpenMM patch.\n",
-        "      %shell pushd /opt/conda/lib/python3.8/site-packages/ \u0026\u0026 \\\n",
+        "      %shell pushd /opt/conda/lib/python3.9/site-packages/ \u0026\u0026 \\\n",
         "          patch -p0 \u003c /content/alphafold/docker/openmm.patch \u0026\u0026 \\\n",
         "          popd\n",
         "\n",
         "      # Make sure stereo_chemical_props.txt is in all locations where it could be searched for.\n",
         "      %shell mkdir -p /content/alphafold/alphafold/common\n",
         "      %shell cp -f /content/stereo_chemical_props.txt /content/alphafold/alphafold/common\n",
-        "      %shell mkdir -p /opt/conda/lib/python3.8/site-packages/alphafold/common/\n",
-        "      %shell cp -f /content/stereo_chemical_props.txt /opt/conda/lib/python3.8/site-packages/alphafold/common/\n",
+        "      %shell mkdir -p /opt/conda/lib/python3.9/site-packages/alphafold/common/\n",
+        "      %shell cp -f /content/stereo_chemical_props.txt /opt/conda/lib/python3.9/site-packages/alphafold/common/\n",
         "\n",
         "      # Load parameters\n",
         "      %shell mkdir --parents \"{PARAMS_DIR}\"\n",
@@ -194,7 +194,7 @@
         "\n",
         "# Make sure everything we need is on the path.\n",
         "import sys\n",
-        "sys.path.append('/opt/conda/lib/python3.8/site-packages')\n",
+        "sys.path.append('/opt/conda/lib/python3.9/site-packages')\n",
         "sys.path.append('/content/alphafold')\n",
         "\n",
         "executed_cells.add(2)"