build bar only on first update

daft/runners/progress_bar.py

@@ -114,27 +114,38 @@ def __init__(self) -> None:
         self._maxinterval = 5.0
         self.tqdm_mod = get_tqdm(False)
         self.pbars: dict[int, Any] = dict()
+        self.bar_configs: dict[int, tuple[str, str]] = dict()
+        self.next_id = 0
 
     def make_new_bar(self, bar_format: str, initial_message: str) -> int:
-        pbar_id = len(self.pbars)
-        self.pbars[pbar_id] = self.tqdm_mod(
-            bar_format=bar_format,
-            desc=initial_message,
-            position=pbar_id,
-            leave=False,
-            mininterval=1.0,
-            maxinterval=self._maxinterval,
-        )
+        pbar_id = self.next_id
+        self.next_id += 1
+        self.bar_configs[pbar_id] = (bar_format, initial_message)
         return pbar_id
 
     def update_bar(self, pbar_id: int, message: str) -> None:
+        if pbar_id not in self.pbars:
+            if pbar_id not in self.bar_configs:
+                raise ValueError(f"No bar configuration found for id {pbar_id}")
+            bar_format, initial_message = self.bar_configs[pbar_id]
+            self.pbars[pbar_id] = self.tqdm_mod(
+                bar_format=bar_format,
+                desc=initial_message,
+                position=pbar_id,
+                leave=False,
+                mininterval=1.0,
+                maxinterval=self._maxinterval,
+            )
+            del self.bar_configs[pbar_id]
         self.pbars[pbar_id].set_description_str(message)
 
     def close_bar(self, pbar_id: int) -> None:
-        self.pbars[pbar_id].close()
-        del self.pbars[pbar_id]
+        if pbar_id in self.pbars:
+            self.pbars[pbar_id].close()
+            del self.pbars[pbar_id]
 
     def close(self) -> None:
-        for p in self.pbars.values():
+        for p in list(self.pbars.values()):
             p.close()
-            del p
+        self.pbars.clear()
+        self.bar_configs.clear()