Add Client.namespaces property to easily retrieve current namespaces

Author: mvantellingen

src/zeep/client.py

@@ -71,7 +71,7 @@ def __getitem__(self, key):
         except ValueError:
             raise AttributeError('Service has no operation %r' % key)
         return OperationProxy(self, key)
-        
+
     def __dir__(self):
         """ Return the names of the operations. """
         return list(dir(super(ServiceProxy, self))
@@ -145,6 +145,10 @@ def __init__(self, wsdl, wsse=None, transport=None,
         self._default_port_name = port_name
         self._default_soapheaders = None
 
+    @property
+    def namespaces(self):
+        return self.wsdl.types.prefix_map
+
     @property
     def service(self):
         """The default ServiceProxy instance