fix OrderedDict implementation for python 2.6

flask_admin/_compat.py

@@ -87,17 +87,4 @@ def with_metaclass(meta, *bases):
 try:
     from collections import OrderedDict
 except ImportError:
-    # Bare-bones OrderedDict implementation for Python2.6 compatibility
-    class OrderedDict(dict):
-        def __init__(self, *args, **kwargs):
-            dict.__init__(self, *args, **kwargs)
-            self.ordered_keys = []
-        def __setitem__(self, key, value):
-            self.ordered_keys.append(key)
-            dict.__setitem__(self, key, value)
-        def __iter__(self):
-            return (k for k in self.ordered_keys)
-        def iteritems(self):
-            return ((k, self[k]) for k in self.ordered_keys)
-        def items(self):
-            return list(self.iteritems())
+    from ordereddict import OrderedDict

setup.py

 # Fix for older setuptools
 import re
 import os
+import sys
 
 from setuptools import setup, find_packages
 
@@ -30,6 +31,14 @@ def grep(attrname):
     return strval
 
 
+install_requires = [
+    'Flask>=0.7',
+    'wtforms'
+]
+
+if sys.version_info[:2] < (2, 7):
+    install_requires.append('ordereddict')
+
 setup(
     name='Flask-Admin',
     version=grep('__version__'),
@@ -43,10 +52,7 @@ setup(
     include_package_data=True,
     zip_safe=False,
     platforms='any',
-    install_requires=[
-        'Flask>=0.7',
-        'wtforms'
-    ],
+    install_requires=install_requires,
     tests_require=[
         'nose>=1.0',
         'pillow==2.9.0',