Closes #3842: Fixes mypy CI failures (#3843)

This PR (closes #3842) fixes failures with mypy version 1.12 (released yesterday)

Co-authored-by: Tess Hayes <[email protected]>

arkouda/groupbyclass.py

@@ -149,8 +149,10 @@ def unique(
     else:
         unique_keys = tuple(a[unique_key_indices] for a in pda)
     if return_groups:
-        groups = unique_keys, permutation, segments, nkeys
-        return *groups, unique_key_indices if return_indices else groups
+        if return_indices:
+            return unique_keys, permutation, segments, nkeys, unique_key_indices
+        else:
+            return unique_keys, permutation, segments, nkeys
     else:
         return unique_keys
 

arkouda/pdarraycreation.py

@@ -922,10 +922,13 @@ def arange(*args, **kwargs) -> pdarray:
         repMsg = generic_msg(
             cmd="arange", args={"start": start, "stop": stop, "stride": stride, "dtype": arg_dtype}
         )
-        return (
-            create_pdarray(repMsg, max_bits=max_bits)
-            if dtype == akint64
-            else array(create_pdarray(repMsg), max_bits=max_bits, dtype=dtype)
+        return cast(
+            pdarray,
+            (
+                create_pdarray(repMsg, max_bits=max_bits)
+                if dtype == akint64
+                else array(create_pdarray(repMsg), max_bits=max_bits, dtype=dtype)
+            ),
         )
     else:
         raise TypeError(