replace has_key with 'in' operator

3 files changed, 7 insertions, 7 deletions

diff --git a/Lib/xml/dom/domreg.py b/Lib/xml/dom/domreg.py
index 684c436016..ec3acdf9c1 100644
--- a/Lib/xml/dom/domreg.py
+++ b/Lib/xml/dom/domreg.py
@@ -57,7 +57,7 @@ def getDOMImplementation(name = None, features = ()):
         return mod.getDOMImplementation()
     elif name:
         return registered[name]()
-    elif os.environ.has_key("PYTHON_DOM"):
+    elif "PYTHON_DOM" in os.environ:
         return getDOMImplementation(name = os.environ["PYTHON_DOM"])
 
     # User did not specify a name, try implementations in arbitrary
diff --git a/Lib/xml/dom/minidom.py b/Lib/xml/dom/minidom.py
index b8bd4512d1..02e3b85d43 100644
--- a/Lib/xml/dom/minidom.py
+++ b/Lib/xml/dom/minidom.py
@@ -491,9 +491,9 @@ class NamedNodeMap(object):
 
     def has_key(self, key):
         if isinstance(key, StringTypes):
-            return self._attrs.has_key(key)
+            return key in self._attrs
         else:
-            return self._attrsNS.has_key(key)
+            return key in self._attrsNS
 
     def keys(self):
         return self._attrs.keys()
@@ -775,10 +775,10 @@ class Element(Node):
     removeAttributeNodeNS = removeAttributeNode
 
     def hasAttribute(self, name):
-        return self._attrs.has_key(name)
+        return name in self._attrs
 
     def hasAttributeNS(self, namespaceURI, localName):
-        return self._attrsNS.has_key((namespaceURI, localName))
+        return (namespaceURI, localName) in self._attrsNS
 
     def getElementsByTagName(self, name):
         return _get_elements_by_tagName_helper(self, name, NodeList())
diff --git a/Lib/xml/dom/xmlbuilder.py b/Lib/xml/dom/xmlbuilder.py
index ac1d448f01..dc7c5d4705 100644
--- a/Lib/xml/dom/xmlbuilder.py
+++ b/Lib/xml/dom/xmlbuilder.py
@@ -91,7 +91,7 @@ class DOMBuilder:
 
     def canSetFeature(self, name, state):
         key = (_name_xform(name), state and 1 or 0)
-        return self._settings.has_key(key)
+        return key in self._settings
 
     # This dictionary maps from (feature,value) to a list of
     # (option,value) pairs that should be set on the Options object.
@@ -247,7 +247,7 @@ class DOMEntityResolver(object):
 
     def _guess_media_encoding(self, source):
         info = source.byteStream.info()
-        if info.has_key("Content-Type"):
+        if "Content-Type" in info:
             for param in info.getplist():
                 if param.startswith("charset="):
                     return param.split("=", 1)[1].lower()