Merge pull request #61 from samstav/copyable-config

a copyable Config object for python 3

simpl/config.py

@@ -438,6 +438,10 @@ def __len__(self):
 
     def __getattr__(self, attr):
         """Get attribute."""
+        # protection from infinite recursion when __init__
+        # is skipped during object creation (probably copy.copy)
+        if attr == '_values':
+            raise AttributeError()
         if attr in self._values:
             return self._values[attr]
         else:

tests/test_config.py

@@ -18,6 +18,7 @@
 from __future__ import print_function
 
 import argparse
+import copy
 import errno
 import os
 import string
@@ -52,6 +53,15 @@ def get_tempfile(self, *args, **kwargs):
         self.addCleanup(fp.close)
         return fp
 
+    def test_copies(self):
+        cfg = config.Config(options=[
+            config.Option('--one', default=1),
+            config.Option('--a', default='a'),
+            config.Option('--none'),
+        ])
+        another = copy.copy(cfg)
+        self.assertEqual(cfg, another)
+
     def test_instantiation(self):
         empty = config.Config(options=[])
         self.assertIsInstance(empty, config.Config)