👽 Add a fit method to MelusineTransformer and BaseMelusineDetector

melusine/base.py

@@ -99,6 +99,23 @@ def parse_column_list(columns: str | Iterable[str]) -> list[str]:
             columns = [columns]
         return list(columns)
 
+    def fit(self, X: MelusineDataset, y: Any = None) -> MelusineTransformer:
+        """A reference implementation of a fitting function.
+
+        Parameters
+        ----------
+        X : The training input samples.
+
+        y : The target values (class labels in classification, real numbers in
+            regression).
+
+        Returns
+        -------
+        self : object
+            Returns self.
+        """
+        return self
+
     def transform(self, data: MelusineDataset) -> MelusineDataset:
         """
         Transform input data.
@@ -196,6 +213,23 @@ def transform_methods(self) -> list[Callable]:
             List of  methods to be called by the transform method.
         """
 
+    def fit(self, X: MelusineDataset, y: Any = None) -> MelusineTransformer:
+        """A reference implementation of a fitting function.
+
+        Parameters
+        ----------
+        X : The training input samples.
+
+        y : The target values (class labels in classification, real numbers in
+            regression).
+
+        Returns
+        -------
+        self : object
+            Returns self.
+        """
+        return self
+
     def transform(self, df: MelusineDataset) -> MelusineDataset:
         """
         Re-definition of super().transform() => specific detector's implementation

tests/gmail/test_gmail.py

@@ -4,10 +4,11 @@
 import pandas as pd
 import pytest
 
-googleapiclient = pytest.importorskip("googleapiclient")
-from google.oauth2.credentials import Credentials
 from unittest.mock import MagicMock, patch
 
+google = pytest.importorskip("google")
+googleapiclient = pytest.importorskip("googleapiclient")
+
 from melusine.connectors.gmail import GmailConnector
 
 
@@ -43,7 +44,7 @@ def mocked_gc():
                     return_value,
                 )
                 mock_build.return_value = mock_service
-                mock_creds_from_file.return_value = Credentials("dummy")
+                mock_creds_from_file.return_value = google.oauth2.credentials.Credentials("dummy")
 
                 return GmailConnector(token_json_path="token.json", done_label="TRASH", target_column="target")
 
@@ -91,7 +92,7 @@ def test_init(mock_exists, mock_creds_from_file, mock_build, caplog):
         return_value,
     )
     mock_build.return_value = mock_service
-    mock_creds_from_file.return_value = Credentials("dummy")
+    mock_creds_from_file.return_value = google.oauth2.credentials.Credentials("dummy")
 
     # Creating an instance of GmailConnector
     with caplog.at_level(logging.DEBUG):
@@ -134,7 +135,7 @@ def test_init_without_creds(mock_flow, mock_build, caplog):
         return_value,
     )
     mock_build.return_value = mock_service
-    mock_flow.return_value.run_local_server.return_value = Credentials("dummy")
+    mock_flow.return_value.run_local_server.return_value = google.oauth2.credentials.Credentials("dummy")
 
     # Creating an instance of GmailConnector
     with caplog.at_level(logging.DEBUG):