astakos: Avoid using dicts as default arguments

snf-astakos-app/astakos/im/target/__init__.py

@@ -87,10 +87,19 @@ def get_pending_key(request):
 
 def handle_third_party_signup(request, userid, provider_module,
                               third_party_key,
-                              provider_info={},
-                              pending_user_params={},
+                              provider_info=None,
+                              pending_user_params=None,
                               template="im/third_party_check_local.html",
-                              extra_context={}):
+                              extra_context=None):
+
+    if provider_info is None:
+        provider_info = {}
+
+    if pending_user_params is None:
+        pending_user_params = {}
+
+    if extra_context is None:
+        extra_context = {}
 
     # build provider module object
     provider_data = {

snf-astakos-app/astakos/im/target/google.py

@@ -114,9 +114,12 @@ def login(request):
 def authenticated(
     request,
     template='im/third_party_check_local.html',
-    extra_context={}
+    extra_context=None
 ):
 
+    if extra_context is None:
+        extra_context = {}
+
     if request.GET.get('error', None):
         return HttpResponseRedirect(reverse('edit_profile'))
 

snf-astakos-app/astakos/im/target/linkedin.py

@@ -100,9 +100,12 @@ def login(request):
 def authenticated(
     request,
     template='im/third_party_check_local.html',
-    extra_context={}
+    extra_context=None
 ):
 
+    if extra_context is None:
+        extra_context = {}
+
     consumer = oauth.Consumer(settings.LINKEDIN_TOKEN,
                               settings.LINKEDIN_SECRET)
     client = oauth.Client(consumer)

snf-astakos-app/astakos/im/target/twitter.py

@@ -107,7 +107,10 @@ def login(request):
 def authenticated(
     request,
     template='im/third_party_check_local.html',
-    extra_context={}):
+    extra_context=None):
+
+    if extra_context is None:
+        extra_context = {}
 
     consumer = oauth.Consumer(settings.TWITTER_TOKEN,
                               settings.TWITTER_SECRET)