Python 3 fixes

flask_admin/_compat.py

@@ -23,6 +23,7 @@ if not PY2:
     iterkeys = lambda d: iter(d.keys())
     itervalues = lambda d: iter(d.values())
     iteritems = lambda d: iter(d.items())
+    filter_list = lambda f, l: list(filter(f, l))
 
     def as_unicode(s):
         if isinstance(s, bytes):
@@ -41,6 +42,7 @@ else:
     iterkeys = lambda d: d.iterkeys()
     itervalues = lambda d: d.itervalues()
     iteritems = lambda d: d.iteritems()
+    filter_list = filter
 
     def as_unicode(s):
         if isinstance(s, str):

flask_admin/contrib/sqla/tools.py

@@ -3,6 +3,7 @@ from sqlalchemy.sql.operators import eq
 from sqlalchemy.exc import DBAPIError
 from ast import literal_eval
 
+from flask.ext.admin._compat import filter_list
 from flask.ext.admin.tools import iterencode, iterdecode
 
 
@@ -24,7 +25,7 @@ def filter_foreign_columns(base_table, columns):
         :param base_table: Table to check against
         :param columns: List of columns to filter
     """
-    return filter(lambda c: c.table == base_table, columns)
+    return filter_list(lambda c: c.table == base_table, columns)
 
 
 def get_primary_key(model):