diff --git a/src/odf/draw.py b/src/odf/draw.py
index af324bcccd..4dbfd0bba0 100644
--- a/src/odf/draw.py
+++ b/src/odf/draw.py
@@ -43,7 +43,7 @@ def StyleRefElement(stylename=None, classnames=None, **args):
 
 def DrawElement(name=None, **args):
     e = Element(name=name, **args)
-    if not args.has_key('displayname'):
+    if 'displayname' not in args:
         e.setAttrNS(DRAWNS,'display-name', name)
     return e
 
@@ -179,4 +179,3 @@ def StrokeDash(**args):
 
 def TextBox(**args):
     return Element(qname = (DRAWNS,'text-box'), **args)
-
diff --git a/src/odf/element.py b/src/odf/element.py
index b3a2b4befd..feedbcc52a 100644
--- a/src/odf/element.py
+++ b/src/odf/element.py
@@ -341,7 +341,7 @@ class Element(Node):
         """
         if namespace is None: namespace = ""
         prefix = _nsassign(namespace)
-        if not self.namespaces.has_key(namespace):
+        if namespace not in self.namespaces:
             self.namespaces[namespace] = prefix
         return prefix
 
diff --git a/src/odf/opendocument.py b/src/odf/opendocument.py
index e2fda0ae0b..7e2a8dd19c 100644
--- a/src/odf/opendocument.py
+++ b/src/odf/opendocument.py
@@ -124,13 +124,13 @@ class OpenDocument:
     def build_caches(self, element):
         """ Called from element.py
         """
-        if not self.element_dict.has_key(element.qname):
+        if element.qname not in self.element_dict:
             self.element_dict[element.qname] = []
         self.element_dict[element.qname].append(element)
         if element.qname == (STYLENS, u'style'):
             self.__register_stylename(element) # Add to style dictionary
         styleref = element.getAttrNS(TEXTNS,u'style-name')
-        if styleref is not None and self._styles_ooo_fix.has_key(styleref):
+        if styleref is not None and styleref in self._styles_ooo_fix:
             element.setAttrNS(TEXTNS,u'style-name', self._styles_ooo_fix[styleref])
 
     def __register_stylename(self, element):
@@ -142,7 +142,7 @@ class OpenDocument:
         if name is None:
             return
         if element.parentNode.qname in ((OFFICENS,u'styles'), (OFFICENS,u'automatic-styles')):
-            if self._styles_dict.has_key(name):
+            if name in self._styles_dict:
                 newname = 'M'+name # Rename style
                 self._styles_ooo_fix[name] = newname
                 # From here on all references to the old name will refer to the new one
diff --git a/src/odf/style.py b/src/odf/style.py
index 76dc4a53be..5247837e81 100644
--- a/src/odf/style.py
+++ b/src/odf/style.py
@@ -24,7 +24,7 @@ from .element import Element
 def StyleElement(**args):
     e = Element(**args)
     if args.get('check_grammar', True) == True:
-        if not args.has_key('displayname'):
+        if 'displayname' not in args:
             e.setAttrNS(STYLENS,'display-name', args.get('name'))
     return e
 
@@ -145,4 +145,3 @@ def TableRowProperties(**args):
 
 def TextProperties(**args):
     return Element(qname = (STYLENS,'text-properties'), **args)
-
diff --git a/src/odf/userfield.py b/src/odf/userfield.py
index 50dbe0e817..f8c775afb6 100644
--- a/src/odf/userfield.py
+++ b/src/odf/userfield.py
@@ -158,7 +158,7 @@ class UserFields(object):
         all_fields = self.document.getElementsByType(UserFieldDecl)
         for f in all_fields:
             field_name = f.getAttribute('name')
-            if data.has_key(field_name):
+            if field_name in data:
                 value_type = f.getAttribute('valuetype')
                 value = data.get(field_name)
                 if value_type == 'string':