bugfux: GUI session data. Prevent crash on missing session data

lib/gui/analysis/stats.py

@@ -60,10 +60,15 @@ class GlobalSession():
         """ str: The full model filename """
         return os.path.join(self._model_dir, self._model_name)
 
+    @property
+    def have_session_data(self) -> bool:
+        """ bool : ``True`` if session data is available otherwise ``False`` """
+        return bool(self._state and self._state["sessions"])
+
     @property
     def batch_sizes(self) -> dict[int, int]:
         """ dict: The batch sizes for each session_id for the model. """
-        if not self._state:
+        if not self.have_session_data:
             return {}
         return {int(sess_id): sess["batchsize"]
                 for sess_id, sess in self._state.get("sessions", {}).items()}
@@ -76,9 +81,9 @@ class GlobalSession():
 
     @property
     def logging_disabled(self) -> bool:
-        """ bool: ``True`` if logging is enabled for the currently training session otherwise
+        """ bool: ``True`` if logging is disabled for the currently training session otherwise
         ``False``. """
-        if not self._state:
+        if not self.have_session_data:
             return True
         max_id = str(max(int(idx) for idx in self._state["sessions"]))
         return self._state["sessions"][max_id]["no_logs"]
@@ -311,6 +316,10 @@ class SessionsSummary():
             within the loaded data as well as the totals.
         """
         logger.debug("Compiling sessions summary data")
+        if not self._session.have_session_data:
+            logger.debug("Session data doesn't exist. Most likely task has been "
+                         "terminated during compilation, or is from LR finder")
+            return []
         self._get_time_stats()
         self._get_per_session_stats()
         if not self._per_session_stats:
@@ -365,9 +374,9 @@ class SessionsSummary():
             compiled = []
             for session_id in self._time_stats:
                 logger.debug("Compiling session ID: %s", session_id)
-                if not self._state:
-                    logger.debug("Session state dict doesn't exist. Most likely task has been "
-                                 "terminated during compilation")
+                if not self._session.have_session_data:
+                    logger.debug("Session data doesn't exist. Most likely task has been "
+                                 "terminated during compilation, or is from LR finder")
                     return
                 compiled.append(self._collate_stats(session_id))
 
@@ -435,6 +444,8 @@ class SessionsSummary():
             iterations for all session ids within the loaded data.
         """
         logger.debug("Compiling Totals")
+        starttime = 0.0
+        endtime = 0.0
         elapsed = 0
         examples = 0
         iterations = 0
@@ -450,13 +461,14 @@ class SessionsSummary():
             batchset.add(summary["batch"])
             iterations += summary["iterations"]
         batch = ",".join(str(bs) for bs in batchset)
-        totals = {"session": "Total",
-                  "start": starttime,
-                  "end": endtime,
-                  "elapsed": elapsed,
-                  "rate": examples / elapsed if elapsed != 0 else 0,
-                  "batch": batch,
-                  "iterations": iterations}
+        totals: dict[str, str | int | float] = {
+            "session": "Total",
+            "start": starttime,
+            "end": endtime,
+            "elapsed": elapsed,
+            "rate": examples / elapsed if elapsed != 0 else 0,
+            "batch": batch,
+            "iterations": iterations}
         logger.debug(totals)
         return totals
 
@@ -533,7 +545,7 @@ class Calculations():
         ``True`` if values significantly away from the average should be excluded, otherwise
         ``False``. Default: ``False``
     """
-    def __init__(self, session_id,
+    def __init__(self, session_id,  # pylint:disable=too-many-positional-arguments
                  display: str = "loss",
                  loss_keys: list[str] | str = "loss",
                  selections: list[str] | str = "raw",

lib/gui/display_analysis.py

@@ -195,12 +195,13 @@ class Analysis(DisplayPage):  # pylint:disable=too-many-ancestors
         else:
             logger.debug("Retrieving data from thread")
             result = self._thread.get_result()
-            if result is None:
+            del self._thread
+            self._thread = None
+            if not result:
                 logger.debug("No result from session summary. Clearing analysis view")
                 self._clear_session()
                 return
             self._summary = result
-            self._thread = None
             self.set_info(f"Session: {message}")
             self._stats.tree_insert_data(self._summary)