Add mc-db-unique as default single-(owner,repo) selector

client/qldbtools/qldbtools/session-4-unique.py

@@ -0,0 +1,16 @@
+# Experimental work with utils.py, to be merged into it.
+from utils import *
+from pprint import pprint
+
+#* Reload gzipped CSV file to continue work
+df2 = pd.read_csv('db-info-2.csv')
+
+
+df_sorted = df2.sort_values(by=['owner', 'name', 'creationTime'])
+df_unique = df_sorted.groupby(['owner', 'name']).first().reset_index()
+
+# 
+# Local Variables:
+# python-shell-virtualenv-root: "~/work-gh/mrva/mrvacommander/client/qldbtools/venv/"
+# End:
+#