update usage of deprecated profiler (#5010)

* drop deprecated profiler

* lut

Co-authored-by: Roger Shieh <sh.rog@protonmail.ch>

pl_examples/domain_templates/imagenet.py

@@ -237,7 +237,7 @@ def run_cli():
                                help='seed for initializing training.')
     parser = ImageNetLightningModel.add_model_specific_args(parent_parser)
     parser.set_defaults(
-        profiler=True,
+        profiler="simple",
         deterministic=True,
         max_epochs=90,
     )

pytorch_lightning/trainer/connectors/profiler_connector.py

@@ -18,6 +18,11 @@ from pytorch_lightning.profiler import BaseProfiler, PassThroughProfiler, Simple
 from pytorch_lightning.utilities import rank_zero_warn
 from pytorch_lightning.utilities.exceptions import MisconfigurationException
 
+PROFILERS = {
+    "simple": SimpleProfiler,
+    "advanced": AdvancedProfiler,
+}
+
 
 class ProfilerConnector:
 
@@ -28,9 +33,9 @@ class ProfilerConnector:
 
         if profiler and not isinstance(profiler, (bool, str, BaseProfiler)):
             # TODO: Update exception on removal of bool
-            raise MisconfigurationException("Only None, bool, str and subclasses of `BaseProfiler` "
-                                            "are valid values for `Trainer`'s `profiler` parameter. "
-                                            f"Received {profiler} which is of type {type(profiler)}.")
+            raise MisconfigurationException("Only None, bool, str and subclasses of `BaseProfiler`"
+                                            " are valid values for `Trainer`'s `profiler` parameter."
+                                            f" Received {profiler} which is of type {type(profiler)}.")
 
         if isinstance(profiler, bool):
             rank_zero_warn("Passing a bool value as a `profiler` argument to `Trainer` is deprecated"
@@ -39,11 +44,9 @@ class ProfilerConnector:
             if profiler:
                 profiler = SimpleProfiler()
         elif isinstance(profiler, str):
-            profiler = profiler.lower()
-            if profiler == "simple":
-                profiler = SimpleProfiler()
-            elif profiler == "advanced":
-                profiler = AdvancedProfiler()
+            if profiler.lower() in PROFILERS:
+                profiler_class = PROFILERS[profiler.lower()]
+                profiler = profiler_class()
             else:
                 raise ValueError("When passing string value for the `profiler` parameter of"
                                  " `Trainer`, it can only be 'simple' or 'advanced'")

tests/trainer/test_trainer.py

@@ -1476,6 +1476,6 @@ def test_trainer_profiler_incorrect_str_arg():
 ))
 def test_trainer_profiler_incorrect_arg_type(profiler):
     with pytest.raises(MisconfigurationException,
-                       match=r"Only None, bool, str and subclasses of `BaseProfiler` "
-                       r"are valid values for `Trainer`'s `profiler` parameter. *"):
+                       match=r"Only None, bool, str and subclasses of `BaseProfiler`"
+                             r" are valid values for `Trainer`'s `profiler` parameter. *"):
         Trainer(profiler=profiler)