Closes #706 refactor flow function (#871)

* Closes #706 refactor  function

* Update flow.py

* Update flow.py

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>

Author: novikovfred

CHANGELOG.md

@@ -12,7 +12,7 @@ See [0Ver](https://0ver.org/).
 
 - Makes `_Nothing` a singleton
 - Fixes typos in documentation
-
+- Refactor `flow` function
 
 ## 0.15.0 aka The initial HKT release
 

returns/_internal/pipeline/flow.py

@@ -1,7 +1,6 @@
 from functools import reduce
 from typing import TypeVar
 
-from returns.functions import compose
 
 _InstanceType = TypeVar('_InstanceType')
 _PipelineStepType = TypeVar('_PipelineStepType')
@@ -49,4 +48,8 @@ def flow(
 
     Requires our :ref:`mypy plugin <mypy-plugins>`.
     """
-    return reduce(compose, functions)(instance)  # type: ignore
+    return reduce(  # type: ignore
+        lambda composed, function: function(composed),
+        functions,
+        instance,
+    )