updated 105_6

Author: shenmingfu

DP1/100_How_to_Use_RSP_Tools/105_Image_reprocessing/105_6_Create_custom_coadd_images.ipynb

@@ -22,7 +22,7 @@
     "Data Release: <a href=\"https://dp1.lsst.io/\">Data Preview 1</a> <br>\n",
     "Container Size: large <br>\n",
     "LSST Science Pipelines version: r29.2.0 <br>\n",
-    "Last verified to run: 2025-09-02 <br>\n",
+    "Last verified to run: 2026-04-07 <br>\n",
     "Repository: <a href=\"https://github.com/lsst/tutorial-notebooks\">github.com/lsst/tutorial-notebooks</a> <br>"
    ]
   },
@@ -547,7 +547,38 @@
    "id": "85394b0f-7222-4624-89af-4c1f9c70d7d8",
    "metadata": {},
    "source": [
-    "Users cannot write to the main DP1 Butler repository. Instead, make a writable repository where custom coadd outputs will be written. The call to `use_local_butler` creates a new directory that will contain the local Butler repository, within the `$SCRATCH_DIR` temporary space that gets deleted weekly. Use this temporary space because the custom coadd processing produces of order a gigabyte of intermediate files."
+    "Users cannot write to the main DP1 Butler repository. Instead, make a writable repository where custom coadd outputs will be written. \n",
+    "\n",
+    "The call to `use_local_butler` sets a directory that will contain the local Butler repository, within the `$SCRATCH_DIR` temporary space that gets deleted every Sunday. Use this temporary space because the custom coadd processing produces of order a gigabyte of intermediate files. Do not run this step (and following steps) right before or during Sunday cleaning time. \n",
+    "\n",
+    "Note `use_local_butler` does not create a top-level directory, but rather one in the scratch space; it does not create `$SCRATCH_DIR`. Thus, check whether that user scratch exists first before using it and create it if it does not.\n",
+    "\n",
+    "Remove and recreate `scratch_path` if somehow it is not a directory but does exist. "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "108cb108-1ee3-4164-b6e9-b6a01a9fe639",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "scratch_path = Path(os.getenv(\"SCRATCH_DIR\"))\n",
+    "\n",
+    "if not scratch_path.exists():\n",
+    "    scratch_path.mkdir(parents=True)\n",
+    "    \n",
+    "elif not scratch_path.is_dir():\n",
+    "    scratch_path.unlink()\n",
+    "    scratch_path.mkdir()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "a055e8f6-865e-4658-a814-aa928ca44c8d",
+   "metadata": {},
+   "source": [
+    "Set the directory that will contain the local Butler repository."
    ]
   },
   {
@@ -557,7 +588,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "local_repo_path = Path(os.getenv(\"SCRATCH_DIR\"), \"my_local_repo\")\n",
+    "local_repo_path = Path(scratch_path, \"my_local_repo\")\n",
     "out_butler = executor.use_local_butler(local_repo_path)"
    ]
   },
@@ -625,7 +656,7 @@
     "fig = plt.figure(figsize=(10, 8))\n",
     "afw_display = afwDisplay.Display(frame=fig)\n",
     "afw_display.scale('asinh', 'zscale')\n",
-    "afw_display.mtv(deepCoadd.image)\n",
+    "afw_display.image(deepCoadd.image)\n",
     "plt.gca().axis('on')\n",
     "plt.show()"
    ]
@@ -736,8 +767,8 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "%reset -f\n",
-    "! rm -r $SCRATCH_DIR/my_local_repo"
+    "# %reset -f\n",
+    "# ! rm -r $SCRATCH_DIR/my_local_repo"
    ]
   }
  ],