Fixed issue #19 , which was introduced in commit 33d3ccb

Author: jmfernandez

treecript/parser.py

@@ -211,7 +211,7 @@ def metrics_parser(
     pids["command"] = main_commands
     pids["command_label"] = command_labels
     pids["full_command"] = full_command
-    pids["full_stats"] = pd.array(full_stats)
+    pids["full_stats"] = pd.array(full_stats, dtype=object, copy=False)
     pids["subtree_root"] = subtree_root
 
     return pids, num_cpu_cores, sampling_period_seconds