Expose recursive_round function

src/stactools/core/utils/round.py

@@ -12,25 +12,13 @@ def round_coordinates(stac_object: S, precision: int = DEFAULT_PRECISION) -> S:
     """Rounds Item geometry and bbox coordinates or Collection spatial extent
     bbox coordinates to specified precision.
 
-    Any tuples encountered will be converted to lists.
-
     Args:
         stac_object (S): A pystac Item or Collection.
         precision (int): Number of decimal places for rounding.
 
     Returns:
         S: The original PySTAC Item or Collection, with rounded coordinates.
     """
-
-    def recursive_round(coordinates: List[Any], precision: int) -> List[Any]:
-        for idx, value in enumerate(coordinates):
-            if isinstance(value, (int, float)):
-                coordinates[idx] = round(value, precision)
-            else:
-                coordinates[idx] = list(value)  # handle any tuples
-                coordinates[idx] = recursive_round(coordinates[idx], precision)
-        return coordinates
-
     if isinstance(stac_object, Item):
         if stac_object.geometry is not None:
             stac_object.geometry["coordinates"] = recursive_round(
@@ -46,3 +34,27 @@ def recursive_round(coordinates: List[Any], precision: int) -> List[Any]:
         )
 
     return stac_object
+
+
+def recursive_round(coordinates: List[Any], precision: int) -> List[Any]:
+    """Rounds a list of numbers. The list can contain additional nested lists or
+    tuples of numbers.
+
+    Any tuples encountered will be converted to lists.
+
+    Args:
+        coordinates (List[Any]): A list of numbers, possibly containing nested
+            lists or tuples of numbers.
+        precision (int): Number of decimal places to use for rounding.
+
+    Returns:
+        List[Any]: a list (possibly nested) of numbers rounded to the given
+            precision.
+    """
+    for idx, value in enumerate(coordinates):
+        if isinstance(value, (int, float)):
+            coordinates[idx] = round(value, precision)
+        else:
+            coordinates[idx] = list(value)  # handle any tuples
+            coordinates[idx] = recursive_round(coordinates[idx], precision)
+    return coordinates