fix labeling

eitprocessing/eit_data/__init__.py

@@ -227,9 +227,11 @@ def check_equivalence(cls, a: T, b: T, raise_=False) -> bool:
         return False
 
     def _sliced_copy(
-        self: Self, start_index: int, end_index: int, label: str | None = None
+        self,
+        start_index: int,
+        end_index: int,
+        label: str,
     ) -> Self:
-        super()._sliced_copy(start_index, end_index, label)
         cls = self._get_vendor_class(self.vendor)
         time = self.time[start_index:end_index]
         nframes = len(time)

eitprocessing/eit_data/eit_data_variant.py

@@ -72,8 +72,6 @@ def concatenate(cls, a: Self, b: Self) -> Self:
     def _sliced_copy(
         self, start_index: int, end_index: int, label: str | None = None
     ) -> Self:
-        super()._sliced_copy(start_index, end_index, label)
-
         pixel_impedance = self.pixel_impedance[start_index:end_index, :, :]
 
         return self.__class__(

eitprocessing/mixins/slicing.py

@@ -10,7 +10,6 @@
 
 
 class SelectByIndex(ABC):
-    time: NDArray
     label: str
 
     def select_by_index(  # pylint: disable=too-many-arguments
@@ -23,9 +22,17 @@ def select_by_index(  # pylint: disable=too-many-arguments
             warnings.warn("No starting or end timepoint was selected.")
             return self
 
-        start = 0 or None
+        start = start or 0
         if end is None:
-            end = len(self.time)
+            end = len(self)
+
+        if label is None:
+            if start > end:
+                label = f"No frames selected from <{self.label}>"
+            elif start < end - 1:
+                label = f"Slice ({start}-{end-1}) of <{self.label}>"
+            else:
+                label = f"Frame ({start}) of <{self.label}>"
 
         return self._sliced_copy(start_index=start, end_index=end, label=label)
 
@@ -40,24 +47,19 @@ def __getitem__(self, key: slice | int):
             return self.select_by_index(start_index, end_index)
 
         if isinstance(key, int):
-            return self.select_by_index(start=key, end=key)
+            return self.select_by_index(start=key, end=key + 1)
 
         raise TypeError(
             f"Invalid slicing input. Should be `slice` or `int`, not {type(key)}."
         )
 
     @abstractmethod
     def _sliced_copy(
-        self, start_index: int, end_index: int, label: str | None = None
+        self,
+        start_index: int,
+        end_index: int,
+        label: str,
     ) -> Self:
-        if label is None:
-            if start_index >= end_index:
-                pass
-            elif start_index < end_index - 1:
-                label = f"Frame ({start_index}) of <{self.label}>"
-            else:
-                label = f"Slice ({start_index}-{end_index-1}) of <{self.label}>"
-
         ...