flake8 passing, use pathlib in lieu of os.path to accommodate windows/mac OS

freqtrade/resolvers/freqaimodel_resolver.py

@@ -12,6 +12,7 @@ from freqtrade.exceptions import OperationalException
 from freqtrade.freqai.freqai_interface import IFreqaiModel
 from freqtrade.resolvers import IResolver
 
+
 logger = logging.getLogger(__name__)
 
 
@@ -19,10 +20,11 @@ class FreqaiModelResolver(IResolver):
     """
     This class contains all the logic to load custom hyperopt loss class
     """
+
     object_type = IFreqaiModel
     object_type_str = "FreqaiModel"
     user_subdir = USERPATH_FREQAIMODELS
-    initial_search_path = Path(__file__).parent.parent.joinpath('optimize').resolve()
+    initial_search_path = Path(__file__).parent.parent.joinpath("optimize").resolve()
 
     @staticmethod
     def load_freqaimodel(config: Dict) -> IFreqaiModel:
@@ -31,15 +33,17 @@ class FreqaiModelResolver(IResolver):
         :param config: configuration dictionary
         """
 
-        freqaimodel_name = config.get('freqaimodel')
+        freqaimodel_name = config.get("freqaimodel")
         if not freqaimodel_name:
             raise OperationalException(
                 "No freqaimodel set. Please use `--freqaimodel` to "
                 "specify the FreqaiModel class to use.\n"
             )
-        freqaimodel = FreqaiModelResolver.load_object(freqaimodel_name,
-                                                        config, kwargs={'config': config},
-                                                        extra_dir=config.get('freqaimodel_path'))
-
+        freqaimodel = FreqaiModelResolver.load_object(
+            freqaimodel_name,
+            config,
+            kwargs={"config": config},
+            extra_dir=config.get("freqaimodel_path"),
+        )
 
         return freqaimodel