Some additional improvements from 2to3

boards/forms.py

@@ -87,7 +87,7 b' class NeboardForm(forms.Form):'
     def as_json_errors(self):
         errors = []
 
-        for name, field in self.fields.items():
+        for name, field in list(self.fields.items()):
             if self[name].errors:
                 errors.append({
                     'field': name,

boards/views/all_threads.py

@@ -115,7 +115,7 b' class AllThreadsView(PostMixin, BaseBoar'
 
         text = self._remove_invalid_links(text)
 
-        if FORM_IMAGE in data.keys():
+        if FORM_IMAGE in list(data.keys()):
             image = data[FORM_IMAGE]
         else:
             image = None

boards/views/thread.py

@@ -119,7 +119,7 b' class ThreadView(BaseBoardView, PostMixi'
 
         text = self._remove_invalid_links(text)
 
-        if FORM_IMAGE in data.keys():
+        if FORM_IMAGE in list(data.keys()):
             image = data[FORM_IMAGE]
         else:
             image = None