add 3.10 support

Author: Robbie Muir

test/test_variables.py

@@ -3,6 +3,7 @@
 This module aims at testing the correct behavior of the Variables class.
 """
 
+import sys
 import warnings
 from datetime import datetime
 
@@ -141,9 +142,14 @@ def test_timezone_alignment_with_multiplication() -> None:
     series1 = pd.Series(index=utc_index, data=1.0)
     var1 = model.add_variables(coords=[utc_index], name="var1")
 
-    with warnings.catch_warnings(category=CoordAlignWarning):
-        warnings.simplefilter("error")
-        expr = var1 * series1
+    if sys.version_info >= (3, 11):
+        with warnings.catch_warnings(category=CoordAlignWarning):
+            warnings.simplefilter("error")
+            expr = var1 * series1
+    else:
+        with warnings.catch_warnings():
+            warnings.simplefilter("error")
+            expr = var1 * series1
 
     index: pd.DatetimeIndex = expr.coords["time"].to_index()
     assert index.equals(utc_index)