Merge pull request #1649 from djhoese/bugfix-numpy-typing

Fix requiring newer numpy just for typing annotations

satpy/_compat.py

@@ -26,3 +26,10 @@
     def cached_property(func):
         """Port back functools.cached_property."""
         return property(lru_cache(maxsize=None)(func))
+
+
+try:
+    from numpy.typing import ArrayLike  # noqa
+except ImportError:
+    # numpy <1.20
+    from numpy import ndarray as ArrayLike  # noqa

satpy/enhancements/__init__.py

@@ -17,7 +17,6 @@
 """Enhancements."""
 
 import numpy as np
-from numpy.typing import ArrayLike
 import xarray as xr
 import dask
 import dask.array as da
@@ -26,6 +25,7 @@
 import logging
 import warnings
 from functools import partial
+from satpy._compat import ArrayLike
 
 LOG = logging.getLogger(__name__)