update readme and server example

README

-Pure Python OPC-UA Client and Server 
+Pure Python OPC-UA Client and Server, http://freeopcua.github.io/, https://github.com/FreeOpcUa/python-opcua
 
 API is similar to the python bindings of freeopcua c++ client and servers. However there are differences due to a different implementation and to make it more pythonic.
 
 Most code is autogenerated from xml specification using same code as the one that is going to be used for freeopcua C++ client and server. Adding more functionnality shoud be trivial.
 
-with Python3 the server and client do not require any third party libraries. If using python2.7 or pypy you need to install enum34, with pip for example. Server and client can be run with pypy.
+with Python3 the server and client do not require any third party libraries. If using python2.7 or pypy you need to install enum34, trollius(asyncio), and futures(concurrent.futures), with pip for example. Server and client can be run with pypy.
 
 
 Client: what works:
@@ -15,13 +15,13 @@ Client: what works:
 * subscribing to items for data change
 * adding nodes
 * tested servers: freeopcua C++, freeopcua Python, prosys
+* method call
 
 Client: what is not implemented yet 
-* method call
 * removing nodes 
 * subscribing to events
 * subscribing to status change
-* adding all modify methods
+* adding missing modify methods
 * certificate handling
 * user and password 
 

example-server.py

@@ -22,29 +22,37 @@ if __name__ == "__main__":
     #optional setup logging
     logging.basicConfig(level=logging.WARN)
     #logger = logging.getLogger("opcua.address_space")
-    logger = logging.getLogger("asyncio")
-    logger.setLevel(logging.DEBUG)
-    logger = logging.getLogger("opcua.internal_server")
-    logger.setLevel(logging.DEBUG)
-    logger = logging.getLogger("opcua.subscription_server")
-    logger.setLevel(logging.DEBUG)
-
-    # now setup our server and start it
+    #logger = logging.getLogger("opcua.internal_server")
+    #logger.setLevel(logging.DEBUG)
+    #logger = logging.getLogger("opcua.subscription_server")
+    #logger.setLevel(logging.DEBUG)
+
+
+    # now setup our server 
     server = Server()
     server.set_endpoint("opc.tcp://localhost:4841/freeopcua/server/")
     server.set_server_name("FreeOpcUa Example Server")
-    root = server.get_root_node()
+
+    # setup our own namespace
+    uri = "http://examples.freeopcua.github.io"
+    idx = server.register_namespace(uri)
+
+    # get Objects node, this is where we should put our custom stuff
     objects = server.get_objects_node()
-    myfolder = objects.add_folder(2, "myfolder")
-    myobj = objects.add_object(2, "NewObject")
-    myvar = myobj.add_variable(2, "MyVariable", 6.7)
-    myarrayvar = myobj.add_variable(2, "myarrayvar", [6.7, 7.9])
-    myprop = myobj.add_property(2, "myproperty", "I am a property")
 
+    # populating our address space
+    myfolder = objects.add_folder(idx, "myfolder")
+    myobj = objects.add_object(idx, "NewObject")
+    myvar = myobj.add_variable(idx, "MyVariable", 6.7)
+    myarrayvar = myobj.add_variable(idx, "myarrayvar", [6.7, 7.9])
+    myprop = myobj.add_property(idx, "myproperty", "I am a property")
+    
+    # starting!
     server.start()
     print("Available loggers are: ", logging.Logger.manager.loggerDict.keys())
     try:
         handler = SubHandler()
+        #enable following if you want to subscribe to nodes on server side
         #sub = server.create_subscription(500, handler)
         #handle = sub.subscribe_data_change(myvar)
         #time.sleep(0.1)

opcua/uatypes.py

@@ -443,48 +443,6 @@ class QualifiedName(object):
     
     __repr__ = __str__
 
-'''
-class DateTime(object):
-    def __init__(self, data=None):
-        if data is None:
-            self.data = datetime_to_win_epoch(datetime.now()) 
-        else:
-            self.data = data
-
-    @staticmethod
-    def now():
-        return DateTime.from_datetime(datetime.now())
-
-    @staticmethod
-    def from_datetime(pydt):
-        dt = DateTime()
-        dt.data = datetime_to_win_epoch(pydt) 
-        return dt
-
-    def to_binary(self):
-        return struct.pack("<d", self.data)
-    
-    @staticmethod
-    def from_binary(data):
-        #print("Generating DateTime from {}", data)
-        d = DateTime()
-        d.data = struct.unpack("<d", data.read(8))[0]
-        return d
-
-    @staticmethod
-    def from_time_t(data):
-        return DateTime.from_datetime(datetime.fromtimestamp(data))
-    
-    def to_time_t(self):
-        epoch = datetime.utcfromtimestamp(0)
-        delta = self.win_epoch_to_datetime(self.data)() - epoch
-        return delta.total_seconds()
-
-    def __str__(self):
-        return "Datetime({})".format(win_epoch_to_datetime(self.data).isoformat())
-    __repr__ = __str__
-'''
-
 
 class VariantType(Enum):
     '''