diff --git a/delver/forms.py b/delver/forms.py
index 2732a5e..e3c37b2 100644
--- a/delver/forms.py
+++ b/delver/forms.py
@@ -131,20 +131,14 @@ def action_url(self):
         :return: str
         """
         action_url = self.action
-        return urljoin(
-            self._url if urlparse(action_url).scheme else '',
-            self.action
-        )
+        return urljoin(self._url if urlparse(action_url).scheme else '', action_url)
 
     def has_fields(self, fields):
         """Return ``True`` if all fields are present
 
         :return: bool
         """
-        for field in fields:
-            if field not in dict(self._lxml_form.inputs):
-                return False
-        return True
+        return all(field in dict(self._lxml_form.inputs) for field in fields)
 
     def __getattr__(self, item):
         """Wraps some chosen methods (PARENT_METHODS) from ``lxml.html.FormElement``
diff --git a/delver/helpers.py b/delver/helpers.py
index 0f26e97..16c1d42 100644
--- a/delver/helpers.py
+++ b/delver/helpers.py
@@ -109,7 +109,7 @@ def process_row():
                     headers.append(row_child.text_content())
             elif row_child.tag == 'td':
                 if headers[subindex] in colspans:
-                    if not headers[subindex] in table_dict[index]:
+                    if headers[subindex] not in table_dict[index]:
                         table_dict[index][headers[subindex]] = [row_child.text_content()]
                     else:
                         table_dict[index][headers[subindex]].append(row_child.text_content())