Draft: Resolve "Use Numpy arrays instead of `ForEachObject` instances"

Closes #34 (closed)

lisainstrument/indexing.py

@@ -389,3 +389,31 @@ def full_sc(shape, fill_value, *args, **kwargs):
     else:
         shape = (3, *shape)
     return np.full(shape, fill_value, *args, **kwargs)
+
+
+def dict2mosa(dictionary):
+    """Return a new MOSA array with values given in `dictionary`.
+
+    Args:
+        dictionary: dictionary with MOSA indices as keys
+    """
+    dict_str = {str(key): dictionary[key] for key in dictionary}
+    try:
+        values = [dict_str[mosa] for mosa in MOSAS]
+    except KeyError as error:
+        raise ValueError(f"incomplete dictionary '{dictionary}', must contain '{MOSAS}' as keys") from error
+    return np.stack(values, axis=0)
+
+
+def dict2sc(dictionary):
+    """Return a new SC array with values given in `dictionary`.
+
+    Args:
+        dictionary: dictionary with SC indices as keys
+    """
+    dict_str = {str(key): dictionary[key] for key in dictionary}
+    try:
+        values = [dict_str[sc] for sc in SC]
+    except KeyError as error:
+        raise ValueError(f"incomplete dictionary '{dictionary}', must contain '{SC}' as keys") from error
+    return np.stack(values, axis=0)