Python 3 syntax fixes

doc/conf.py

@@ -159,7 +159,7 @@ linkcheck_anchors_ignore = ["/#!"]
 #
 # on_rtd is whether we are on readthedocs.org
 env_readthedocs = os.environ.get('READTHEDOCS', None)
-print env_readthedocs
+print(env_readthedocs)
 
 if not env_readthedocs:  # only import and set the theme if we're building docs locally
     import sphinx_rtd_theme

tests/device/test_WiFiServer/test_WiFiServer.py

@@ -24,7 +24,7 @@ def setup_echo_server(e):
             while len(data) < 1024 and retries < 3:
                 data += sock.recv(1024)
                 retries += 1
-            print 'Received {} bytes'.format(len(data))
+            print('Received {} bytes'.format(len(data)))
             if len(data) != 1024:
                 raise RuntimeError('client failed to receive response')
             count += 1

tests/device/test_http_client/test_http_client.py

@@ -58,7 +58,7 @@ def setup_http_get(e):
     def flaskThread():
         p = os.path.dirname(os.path.abspath(__file__))
         context = (p + '/server.crt', p + '/server.key')
-        print context
+        print(context)
         app.run(host='0.0.0.0', port=8088, ssl_context=context)    
     th = Thread(target=flaskThread)
     th.start()