Remove Self import and replace with "Self"

Self is not available in Python 3.10

Author: psomhorst

eitprocessing/datahandling/pixelmap.py

@@ -29,7 +29,7 @@
 from collections.abc import Callable
 from copy import deepcopy
 from dataclasses import KW_ONLY, MISSING, asdict, dataclass, field, replace
-from typing import Self, TypeVar, cast
+from typing import TypeVar, cast
 
 import matplotlib as mpl
 import numpy as np
@@ -106,7 +106,7 @@ def __post_init__(self):
 
             object.__setattr__(self, key, merged)
 
-    def update(self, **changes) -> Self:
+    def update(self, **changes) -> "Self":
         """Return a copy of the of the PlotParameters instance replacing attributes.
 
         Similar to dataclass.replace(), but with special handling of `colorbar_kwargs`. `colorbar_kwargs` is updated
@@ -116,7 +116,7 @@ def update(self, **changes) -> Self:
             **changes: New values for attributes to replace.
 
         Returns:
-            Self: A new instance with the replaced attributes.
+            "Self": A new instance with the replaced attributes.
         """
         if "colorbar_kwargs" in changes:
             changes["colorbar_kwargs"] = self.colorbar_kwargs | changes["colorbar_kwargs"]
@@ -175,7 +175,7 @@ def threshold(
         keep_sign: bool = False,
         fill_value: float = np.nan,
         **return_attrs: dict | None,
-    ) -> Self:
+    ) -> "Self":
         """Threshold the pixel map values.
 
         This method applies a threshold to the pixel map values, setting values that do not meet the threshold condition
@@ -197,7 +197,7 @@ def threshold(
             **return_attrs (dict | None): Additional attributes to pass to the new PixelMap instance.
 
         Returns:
-            Self: A new object instance with the thresholded values.
+            "Self": A new object instance with the thresholded values.
         """
         compare_values = np.abs(self.values) if absolute else self.values
         sign = np.sign(self.values) if keep_sign else 1.0
@@ -358,7 +358,7 @@ def convert_to(self, target_type: type[T], *, keep_attrs: bool = False, **kwargs
 
         return target_type(**data)
 
-    def update(self, **changes) -> Self:
+    def update(self, **changes) -> "Self":
         """Return a copy of the of the PixelMap instance replacing attributes.
 
         Similar to dataclass.replace(), but with special handling of `plot_parameters`. When `plot_parameters` is
@@ -368,7 +368,7 @@ def update(self, **changes) -> Self:
             **changes: New values for attributes to replace.
 
         Returns:
-            Self: A new instance with the replaced attributes.
+            "Self": A new instance with the replaced attributes.
         """
         plot_parameters = self.plot_parameters
         if "plot_parameters" in changes and isinstance(changes["plot_parameters"], dict):