14_evaluation.ipynb: Beginnings of saving results to file

In the future the results for the same graph would be appended to, so
that we will be able to incrementally increase the sample size.

Author: jnareb

14_evaluation.ipynb

@@ -54,7 +54,8 @@
     "import networkx as nx\n",
     "import pandas as pd\n",
     "\n",
-    "from math import sqrt"
+    "from math import sqrt\n",
+    "from pathlib import Path"
    ]
   },
   {
@@ -71,7 +72,7 @@
    "outputs": [],
    "source": [
     "from git_commit_graph_ext.commit_graph import _commit_graph_name, commit_graph\n",
-    "from git_commit_graph_ext.checkpoint import compute_cached_graph, compute_cached_reachability_labels"
+    "from git_commit_graph_ext.checkpoint import compute_cached_graph, compute_cached_reachability_labels, save_df_to_file"
    ]
   },
   {
@@ -1720,6 +1721,35 @@
     "- exact tree intervals: false negatives 3298 out of 4515 positive queries (73.0454 %)"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Append results of evaluation to a file (TODO)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "saving reachability analysis for git-commit_graph to \"datasets/git-commit_graph-df_reachability_sample.csv.gz\"\n"
+     ]
+    }
+   ],
+   "source": [
+    "df_filename = 'datasets/' + graph_name + '-df_reachability_sample.csv.gz'\n",
+    "if Path(df_filename).exists():\n",
+    "    print('appending not implemented yet !!!')\n",
+    "else:\n",
+    "    print('saving reachability analysis for {} to \"{}\"'.format(graph_name, df_filename))\n",
+    "    save_df_to_file(conn_sample_df, df_filename)"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},