missing file

returns/methods/partition.py

@@ -0,0 +1,38 @@
+
+from typing import Iterable, List, TypeVar
+
+from returns.interfaces.specific import result
+from returns.primitives.exceptions import UnwrapFailedError
+
+_ValueType = TypeVar('_ValueType', covariant=True)
+_ErrorType = TypeVar('_ErrorType', covariant=True)
+_AdditionalType = TypeVar('_AdditionalType')
+
+
+def partition(
+    containers: Iterable[
+        result.ResultBasedN[_ValueType, _ErrorType, _AdditionalType]
+    ],
+) -> tuple[List[_ValueType], List[_ErrorType]]:
+    """
+    Partition a list of results into successful and failed unwrapped values.
+
+    Preserves order.
+
+    .. code:: python
+
+        >>> from returns.result import Failure, Success
+        >>> from returns.methods import partition
+        >>> results = [Success(1), Failure(2), Success(3), Failure(4)]
+        >>> partition(results)
+        ([1, 3], [2,4])
+
+    """
+    successes = []
+    failures = []
+    for container in containers:
+        try:
+            successes.append(container.unwrap())
+        except UnwrapFailedError:
+            failures.append(container.failure())
+    return successes, failures

tests/test_result/test_result_partition.py

@@ -1,8 +1,7 @@
 
 import pytest
 
-from returns.future import IOResult
-from returns.io import IO
+from returns.io import IO, IOResult
 from returns.methods import partition
 from returns.result import Failure, Success