Fix Pandas indexing.

Workaround around pandas-dev/pandas#42430.

Author: vnmabus

skfda/_utils/_utils.py

@@ -645,6 +645,11 @@ def _int_to_real(array: np.ndarray) -> np.ndarray:
 def _check_array_key(array: np.ndarray, key: Any) -> Any:
     """Check a getitem key."""
     key = check_array_indexer(array, key)
+    if isinstance(key, tuple):
+        non_ellipsis = [i for i in key if i is not Ellipsis]
+        if len(non_ellipsis) > 1:
+            raise KeyError(key)
+        key = non_ellipsis[0]
 
     if isinstance(key, numbers.Integral):  # To accept also numpy ints
         key = int(key)

skfda/exploratory/stats/_stats.py

@@ -5,7 +5,7 @@
 
 import numpy as np
 
-from ...misc.metrics import l2_distance, l2_norm
+from ...misc.metrics import Metric, l2_distance, l2_norm
 from ...representation import FData, FDataGrid
 from ..depth import Depth, ModifiedBandDepth
 
@@ -121,7 +121,7 @@ def geometric_median(
     X: T,
     *,
     tol: float = 1.e-8,
-    metric: Callable[[T, T], np.ndarray] = l2_distance,
+    metric: Metric[T] = l2_distance,
 ) -> T:
     r"""Compute the geometric median.