closes #17, #18, #19

Author: bckohan

enum_properties/__init__.py

@@ -18,13 +18,17 @@
 import enum
 # pylint: disable=protected-access
 import unicodedata
-from collections.abc import Generator, Hashable, Iterable
+from collections.abc import (  # pylint: disable=E0611
+    Generator,
+    Hashable,
+    Iterable,
+)
 
 try:
     from functools import cached_property
-except ImportError:
+except ImportError:  # pragma: no cover
     # todo remove when python 3.7 support is dropped
-    cached_property = property  # pragma: no cover
+    cached_property = property  # pylint: disable=C0103
 
 
 VERSION = (1, 3, 0)
@@ -120,7 +124,7 @@ class SymmetricMixin:  # pylint: disable=R0903
 
     _ep_symmetric_map_ = {}
     _ep_isymmetric_map_ = {}
-    _symmetric_builtins_ = ['name']
+    _symmetric_builtins_ = []
 
     def __eq__(self, value):
         """Symmetric equality - try to coerce value before failure"""
@@ -369,11 +373,12 @@ def __new__(  # pylint: disable=W0221
             classdict
         )
         cls._ep_coerce_types_ = []
-        cls._ep_symmetric_map_ = {}
+        cls._ep_symmetric_map_ = cls._member_map_
         cls._ep_isymmetric_map_ = {}
         cls.enum_properties = list(classdict._ep_properties_.keys())
 
         def add_sym_lookup(prop, p_val, enum_inst):
+            print(prop, p_val, enum_inst)
             if not isinstance(p_val, Hashable):
                 raise ValueError(
                     f'{cls}.{prop}:{p_val} is not hashable. Symmetrical '
@@ -516,19 +521,22 @@ def flagged(self):
         """
         Returns the list of flags that are active.
         """
-        # do import here to keep lib less brittle b/c this is a private
-        # include and may change, rely on CI to find issues
-        from enum import _decompose  # pylint: disable=C0415
-        return [
-            flag for flag in _decompose(self.__class__, self._value_)[0]
-            if flag != 0
-        ]
+        return list(flag for flag in iter(self))
 
     def __iter__(self):
         """
         Return a generator for the active flags.
         """
-        return (flag for flag in self.flagged)
+        return (
+            member for member in self.__class__
+            if (
+                (member.value != 0) and
+                # make sure member is a power of 2, composites are included in
+                # iteration < 3.11
+                ((member.value & (member.value - 1)) == 0) and
+                (self.value & member.value == member.value)
+            )
+        )
 
     def __len__(self):
         """

enum_properties/tests/tests.py

@@ -931,6 +931,10 @@ class Perm(
             X = 4, 'execute'
             RWX = 7, 'all'
 
+            @property
+            def custom_prop(self):
+                return self.label.upper()
+
         self.assertEqual(Perm.R.label, 'read')
         self.assertEqual(Perm.W.label, 'write')
         self.assertEqual(Perm.X.label, 'execute')
@@ -941,6 +945,9 @@ class Perm(
         self.assertTrue(Perm.X is Perm('execute'))
         self.assertTrue(Perm.RWX is Perm('all'))
 
+        self.assertEqual(Perm.W.custom_prop, 'WRITE')
+        self.assertEqual(Perm.RWX.custom_prop, 'ALL')
+
         self.assertTrue((Perm.R | Perm.W | Perm.X) is Perm('RWX'))
         self.assertTrue(Perm([Perm.R, Perm.W, Perm.X]) is Perm('RWX'))
         self.assertTrue(Perm({'read', 'write', 'execute'}) is Perm('RWX'))
@@ -987,6 +994,10 @@ class Perm(
             X = auto(), 'execute'
             RWX = R | W | X, 'all'
 
+            @property
+            def custom_prop(self):
+                return self.label.upper()
+
         self.assertEqual(Perm.R.label, 'read')
         self.assertEqual(Perm.W.label, 'write')
         self.assertEqual(Perm.X.label, 'execute')
@@ -997,6 +1008,9 @@ class Perm(
         self.assertTrue(Perm.X is Perm('execute'))
         self.assertTrue(Perm.RWX is Perm('all'))
 
+        self.assertEqual(Perm.W.custom_prop, 'WRITE')
+        self.assertEqual(Perm.RWX.custom_prop, 'ALL')
+
         self.assertTrue((Perm.R | Perm.W | Perm.X) is Perm('RWX'))
         self.assertTrue(Perm([Perm.R, Perm.W, Perm.X]) is Perm('RWX'))
         self.assertTrue(Perm({'read', 'write', 'execute'}) is Perm('RWX'))

setup.cfg

@@ -15,6 +15,9 @@ valid-metaclass-classmethod-first-arg = mcs
 [pylint.DESIGN]
 max-branches=15
 
+[pylint.MESSAGES CONTROL]
+disable=W0511
+
 [darglint]
 # Darglint integrates with flake8
 # https://github.com/terrencepreilly/darglint