fix(reader): Pose reader code cleanup

aeon/io/reader.py

@@ -295,10 +295,9 @@ def read(self, file: Path) -> pd.DataFrame:
         config_file_dir = Path(self._model_root) / model_dir
         if not config_file_dir.exists():
             raise FileNotFoundError(f"Cannot find model dir {config_file_dir}")
-        config_file = self.get_config_file(config_file_dir)
-        identities = self.get_class_names(config_file)
-        parts = self.get_bodyparts(config_file)
-        self.config_file = config_file
+        self.config_file = self.get_config_file(config_file_dir)
+        identities = self.get_class_names()
+        parts = self.get_bodyparts()
 
         # Using bodyparts, assign column names to Harp register values, and read data in default format.
         try:  # Bonsai.Sleap0.2
@@ -328,7 +327,7 @@ def read(self, file: Path) -> pd.DataFrame:
             parts = unique_parts
 
         # Set new columns, and reformat `data`.
-        data = self.class_int2str(data, config_file_dir)
+        data = self.class_int2str(data)
         n_parts = len(parts)
         part_data_list = [pd.DataFrame()] * n_parts
         new_columns = ["identity", "identity_likelihood", "part", "x", "y", "part_likelihood"]
@@ -351,46 +350,45 @@ def read(self, file: Path) -> pd.DataFrame:
         new_data = pd.concat(part_data_list)
         return new_data.sort_index()
 
-    def get_class_names(self, file: Path) -> list[str]:
+    def get_class_names(self) -> list[str]:
         """Returns a list of classes from a model's config file."""
         classes = None
-        with open(file) as f:
+        with open(self.config_file) as f:
             config = json.load(f)
-        if file.stem == "confmap_config":  # SLEAP
+        if self.config_file.stem == "confmap_config":  # SLEAP
             try:
                 heads = config["model"]["heads"]
                 classes = util.find_nested_key(heads, "class_vectors")["classes"]
             except KeyError as err:
                 if not classes:
-                    raise KeyError(f"Cannot find class_vectors in {file}.") from err
+                    raise KeyError(f"Cannot find class_vectors in {self.config_file}.") from err
         return classes
 
-    def get_bodyparts(self, file: Path) -> list[str]:
+    def get_bodyparts(self) -> list[str]:
         """Returns a list of bodyparts from a model's config file."""
         parts = []
-        with open(file) as f:
+        with open(self.config_file) as f:
             config = json.load(f)
-        if file.stem == "confmap_config":  # SLEAP
+        if self.config_file.stem == "confmap_config":  # SLEAP
             try:
                 heads = config["model"]["heads"]
                 parts = [util.find_nested_key(heads, "anchor_part")]
                 parts += util.find_nested_key(heads, "part_names")
             except KeyError as err:
                 if not parts:
-                    raise KeyError(f"Cannot find bodyparts in {file}.") from err
+                    raise KeyError(f"Cannot find bodyparts in {self.config_file}.") from err
         return parts
 
-    def class_int2str(self, data: pd.DataFrame, config_file_dir: Path) -> pd.DataFrame:
+    def class_int2str(self, data: pd.DataFrame) -> pd.DataFrame:
         """Converts a class integer in a tracking data dataframe to its associated string (subject id)."""
-        config_file = self.get_config_file(config_file_dir)
-        if config_file.stem == "confmap_config":  # SLEAP
-            with open(config_file) as f:
+        if self.config_file.stem == "confmap_config":  # SLEAP
+            with open(self.config_file) as f:
                 config = json.load(f)
             try:
                 heads = config["model"]["heads"]
                 classes = util.find_nested_key(heads, "classes")
             except KeyError as err:
-                raise KeyError(f"Cannot find classes in {config_file}.") from err
+                raise KeyError(f"Cannot find classes in {self.config_file}.") from err
             for i, subj in enumerate(classes):
                 data.loc[data["identity"] == i, "identity"] = subj
         return data