added fr.summary property

csst_common/file_recorder.py

@@ -91,3 +91,11 @@ class FileRecorder(list):
         if outs['show_length']:
             lines.append(f'Length = {len(self)} rows')
         return "\n".join(lines)
+
+    @property
+    def summary(self):
+        return f"(" \
+               f"{len(self)} alleged, " \
+               f"{len(self) - sum(self.to_table()['existence'])} missing, " \
+               f"{sum(self.to_table()['existence'])} to be pushed" \
+               f")"