Compatibility with 3.8 restored

src/megaradrp/processing/modeldesc/base.py

@@ -8,7 +8,12 @@
 #
 
 import abc
-from collections.abc import Sequence  # for typing
+import sys
+
+if sys.version_info[:2] <= (3, 8):
+    from typing import Sequence  # for typing
+else:
+    from collections.abc import Sequence  # for typing
 
 import numpy as np
 

src/megaradrp/processing/modeldesc/gaussbox.py

@@ -7,8 +7,11 @@
 # License-Filename: LICENSE.txt
 #
 
-
-from collections.abc import Sequence  # for typing
+import sys
+if sys.version_info[:2] <= (3, 8):
+    from typing import Sequence  # for typing
+else:
+    from collections.abc import Sequence  # for typing
 
 from numina.modeling.gaussbox import GaussBox
 import numpy as np

src/megaradrp/processing/modeldesc/moffat.py

@@ -7,7 +7,11 @@
 # License-Filename: LICENSE.txt
 #
 
-from collections.abc import Sequence  # for typing
+import sys
+if sys.version_info[:2] <= (3, 8):
+    from typing import Sequence  # for typing
+else:
+    from collections.abc import Sequence  # for typing
 
 from astropy.modeling.functional_models import Moffat1D
 import numpy as np

src/megaradrp/processing/modelmap.py

@@ -9,9 +9,14 @@
 
 import bisect
 import collections
-from collections.abc import Sequence  # for typing
 import logging
 import math
+import sys
+
+if sys.version_info[:2] <= (3, 8):
+    from typing import Sequence  # for typing
+else:
+    from collections.abc import Sequence  # for typing
 
 from astropy.modeling import fitting
 from astropy.modeling.functional_models import Const1D