Move Multiplexed to its own module

Author: jaraco

importlib_resources/abc.py

@@ -1,9 +1,8 @@
 from __future__ import absolute_import
 
 import abc
-import itertools
 
-from ._compat import ABC, FileNotFoundError, suppress
+from ._compat import ABC, FileNotFoundError
 
 # Use mypy's comment syntax for Python 2 compatibility
 try:
@@ -117,54 +116,6 @@ def open(self, mode='r', *args, **kwargs):
         """
 
 
-class Multiplexed(Traversable):
-    """
-    Given a series of Traversable objects, implement a merged
-    version of the interface across all objects. Useful for
-    namespace packages which may be multihomed at a single
-    name.
-    """
-
-    def __init__(self, *paths):
-        self._paths = paths
-
-    def iterdir(self):
-        return itertools.chain.from_iterable(
-            path.iterdir() for path in self._paths)
-
-    def read_bytes(self):
-        return self.open(mode='rb').read()
-
-    def read_text(self, *args, **kwargs):
-        return self.open(mode='r', *args, **kwargs).read()
-
-    def is_dir(self):
-        return any(path.is_dir() for path in self._paths)
-
-    def is_file(self):
-        return any(path.is_file() for path in self._paths)
-
-    def joinpath(self, child):
-        children = (
-            path.joinpath(child)
-            for path in self._paths
-            )
-        existing = (
-            child
-            for child in children
-            if child.is_dir() or child.is_file()
-            )
-        return Multiplexed(*existing)
-
-    __truediv__ = joinpath
-
-    def open(self, *args, **kwargs):
-        for path in self._paths[:-1]:
-            with suppress(Exception):
-                return path.open(*args, **kwargs)
-        return self._paths[-1].open(*args, **kwargs)
-
-
 class TraversableResources(ResourceReader):
     @abc.abstractmethod
     def files(self):

importlib_resources/namespace.py

@@ -0,0 +1,51 @@
+import itertools
+from ._compat import suppress
+from .abc import Traversable
+
+
+class Multiplexed(Traversable):
+    """
+    Given a series of Traversable objects, implement a merged
+    version of the interface across all objects. Useful for
+    namespace packages which may be multihomed at a single
+    name.
+    """
+
+    def __init__(self, *paths):
+        self._paths = paths
+
+    def iterdir(self):
+        return itertools.chain.from_iterable(
+            path.iterdir() for path in self._paths)
+
+    def read_bytes(self):
+        return self.open(mode='rb').read()
+
+    def read_text(self, *args, **kwargs):
+        return self.open(mode='r', *args, **kwargs).read()
+
+    def is_dir(self):
+        return any(path.is_dir() for path in self._paths)
+
+    def is_file(self):
+        return any(path.is_file() for path in self._paths)
+
+    def joinpath(self, child):
+        children = (
+            path.joinpath(child)
+            for path in self._paths
+            )
+        existing = (
+            child
+            for child in children
+            if child.is_dir() or child.is_file()
+            )
+        return Multiplexed(*existing)
+
+    __truediv__ = joinpath
+
+    def open(self, *args, **kwargs):
+        for path in self._paths[:-1]:
+            with suppress(Exception):
+                return path.open(*args, **kwargs)
+        return self._paths[-1].open(*args, **kwargs)