Merge pull request #635 from sbrunner/matplotlib

Fix for optional matplotlib

Author: sbrunner

deskew/__init__.py

@@ -3,8 +3,6 @@
 import warnings
 from typing import TYPE_CHECKING, Any
 
-import matplotlib.axes
-import matplotlib.projections.polar
 import numpy as np
 import numpy.typing as npt
 from skimage.color import rgb2gray, rgba2rgb
@@ -14,6 +12,8 @@
 if TYPE_CHECKING:
     from typing import TypeAlias
 
+    import matplotlib.projections.polar
+
     ImageType: TypeAlias = npt.NDArray[np.integer[Any] | np.floating[Any]]
     ImageTypeUint64: TypeAlias = npt.NDArray[np.uint8]
     ImageTypeFloat64: TypeAlias = npt.NDArray[np.float64]
@@ -262,7 +262,7 @@ def determine_skew_debug_images(
     axe1.set_title("Corrected angles")
 
     def fill_polar(
-        axe: matplotlib.projections.polar.PolarAxes,
+        axe: "matplotlib.projections.polar.PolarAxes",
         freqs: dict[np.float64, int],
         angles: list[float],
         limits: list[tuple[float, float]],