diff --git a/examples/python/example.py b/examples/python/example.py
index 7e0de34..e00ab35 100644
--- a/examples/python/example.py
+++ b/examples/python/example.py
@@ -66,7 +66,7 @@ print('serverPort    = ', serverPort)
 #
 # Event handler
 #
-class MyEventCallbackClass(libzt.PythonDirectorCallbackClass):
+class MyEventCallbackClass(libzt.EventCallbackClass):
 	def on_zerotier_event(self, msg):
 		global is_online
 		global is_joined
@@ -95,12 +95,12 @@ class MyEventCallbackClass(libzt.PythonDirectorCallbackClass):
 #
 print("Starting ZeroTier...");
 eventCallback = MyEventCallbackClass()
-libzt.zts_start(keyPath, eventCallback, ztServicePort)
+libzt.start(keyPath, eventCallback, ztServicePort)
 print("Waiting for node to come online...")
 while (not is_online):
 	time.sleep(1)
 print("Joining network:", hex(networkId));
-libzt.zts_join(networkId)
+libzt.join(networkId)
 while (not is_joined):
 	time.sleep(1) # You can ping this app at this point
 print('Joined network')
@@ -112,22 +112,23 @@ print('Joined network')
 #
 if (mode == 'server'):
 	print("Starting server...")
+	serv = libzt.socket(libzt.ZTS_AF_INET, libzt.ZTS_SOCK_STREAM, 0)
 	try:
-		serv = libzt.zerotier.socket(libzt.ZTS_AF_INET, libzt.ZTS_SOCK_STREAM, 0)
+		#serv.setblocking(True)
 		serv.bind(('::', serverPort))
 		serv.listen(5)
 		while True:
 			conn, addr = serv.accept()
 			print('Accepted connection from: ', addr)
 			while True:
-				print('recv()...')
+				print('recv:')
 				data = conn.recv(4096)
 				if data:
 					print('data = ', data)
 					#print(type(b'what'))
 					#exit(0)
 				if not data: break
-				print('send()...')
+				print('send:')
 				#bytes(data, 'ascii')  + b'\x00'
 				n_bytes = conn.send(data) # echo back to the server
 				print('sent ' + str(n_bytes) + ' byte(s)')
@@ -135,6 +136,7 @@ if (mode == 'server'):
 			print('client disconnected')
 	except Exception as e:
 		print(e)
+	print('errno=',libzt.errno()) # See include/ZeroTierSockets.h for codes
 
 
 #
@@ -142,17 +144,16 @@ if (mode == 'server'):
 #
 if (mode == 'client'):
 	print("Starting client...")
+	client = libzt.socket(libzt.ZTS_AF_INET, libzt.ZTS_SOCK_STREAM, 0)
 	try:
-		client = libzt.zerotier.socket(libzt.ZTS_AF_INET, libzt.ZTS_SOCK_STREAM, 0)
 		print("connecting...")
 		client.connect((remoteIP, serverPort))
-		print("send...")
+		print("send:")
 		data = 'Hello, world!'
 		client.send(data)
-		print("rx...")
 		data = client.recv(1024)
-
 		print('Received', repr(data))
 	except Exception as e:
 		print(e)
+	print('errno=',libzt.errno())
 
diff --git a/include/ZeroTierSockets.h b/include/ZeroTierSockets.h
index 917c943..0b25342 100644
--- a/include/ZeroTierSockets.h
+++ b/include/ZeroTierSockets.h
@@ -876,6 +876,8 @@ int zts_py_listen(int fd, int backlog);
 PyObject * zts_py_recv(int fd, int len, int flags);
 int zts_py_send(int fd, PyObject *buf, int len, int flags);
 int zts_py_close(int fd);
+int zts_py_setblocking(int fd, int flag);
+int zts_py_getblocking(int fd);
 
 #endif // ZTS_ENABLE_PYTHON
 
diff --git a/pkg/pypi/MANIFEST.in b/pkg/pypi/MANIFEST.in
index f57e51f..bfa060a 100644
--- a/pkg/pypi/MANIFEST.in
+++ b/pkg/pypi/MANIFEST.in
@@ -1,3 +1,3 @@
-README.rst
+README.md
 setup.cfg
 setup.py
diff --git a/pkg/pypi/libzt/__init__.py b/pkg/pypi/libzt/__init__.py
index 3b8b2fe..9c0487c 100644
--- a/pkg/pypi/libzt/__init__.py
+++ b/pkg/pypi/libzt/__init__.py
@@ -1,4 +1,4 @@
 __version__ = "1.3.3"
 
 from .libzt import *
-from .prototype import ztsocket, zerotier
\ No newline at end of file
+from .sockets import *
diff --git a/pkg/pypi/setup.cfg b/pkg/pypi/setup.cfg
index 447a470..36b1ca0 100644
--- a/pkg/pypi/setup.cfg
+++ b/pkg/pypi/setup.cfg
@@ -1,4 +1,4 @@
 [metadata]
 version = attr: libzt.__version__
-description-file = README.rst
+description-file = README.md
 license_files = LICENSE
\ No newline at end of file
diff --git a/pkg/pypi/setup.py b/pkg/pypi/setup.py
index 33155dc..2af77a6 100644
--- a/pkg/pypi/setup.py
+++ b/pkg/pypi/setup.py
@@ -4,6 +4,11 @@ from setuptools import setup, Extension, Command, Distribution
 import glob
 import os
 
+from os import path
+this_directory = path.abspath(path.dirname(__file__))
+with open(path.join(this_directory, 'README.md'), encoding='utf-8') as f:
+    long_description = f.read()
+
 class BinaryDistribution(Distribution):
 	def is_pure(self):
 		return False
@@ -67,16 +72,18 @@ setup(
 	name = 'libzt',
 	version = '1.3.3',
 	description = 'ZeroTier',
-	long_description = 'Encrypted P2P communication between apps and services',
+#	long_description = 'Encrypted P2P communication between apps and services',
+	long_description=long_description,
+    long_description_content_type='text/markdown',
 	author = 'ZeroTier, Inc.',
-	author_email = 'joseph.henry@zerotier.com',
+	author_email = 'joseph@zerotier.com',
 	url = 'https://github.com/zerotier/libzt',
 	license='BUSL 1.1',
-	download_url = 'https://github.com/zerotier/libzt/archive/1.3.3.tar.gz',
-	keywords = 'zerotier sdwan sdn virtual network socket p2p peer-to-peer',
+	download_url = 'https://github.com/zerotier/libzt/releases',
+	keywords = 'zerotier p2p peer-to-peer sdwan sdn virtual network socket tcp udp zt encryption encrypted',
 	py_modules = ['libzt'],
 	packages = ['libzt'],
-	classifiers = ['Development Status :: 3 - Alpha',
+	classifiers = ['Development Status :: 4 - Beta',
 		'Topic :: Internet',
 		'Topic :: System :: Networking',
 		'Topic :: Security :: Cryptography',
@@ -88,13 +95,17 @@ setup(
 		'Intended Audience :: Telecommunications Industry',
 		'Intended Audience :: End Users/Desktop',
 		'License :: Free for non-commercial use',
-		'Operating System :: MacOS :: MacOS X',
+		'Operating System :: MacOS',
 		'Operating System :: Microsoft :: Windows',
 		'Operating System :: POSIX :: BSD',
+		'Operating System :: POSIX :: Linux',
 		'Operating System :: Unix',
-		'Programming Language :: C++',
 		'Programming Language :: C',
-		'Programming Language :: Python'
+		'Programming Language :: C++',
+		'Programming Language :: Python',
+		'Programming Language :: Java',
+		'Programming Language :: C#',
+		'Programming Language :: Rust'
 	],
 	distclass=BinaryDistribution,
 	libraries=[cstuff],
diff --git a/src/bindings/python/PythonSockets.cpp b/src/bindings/python/PythonSockets.cpp
index 1741168..dc7aaf8 100644
--- a/src/bindings/python/PythonSockets.cpp
+++ b/src/bindings/python/PythonSockets.cpp
@@ -22,7 +22,25 @@
 
 #ifdef ZTS_ENABLE_PYTHON
 
-static int tuple_to_sockaddr(int family,
+int zts_py_setblocking(int fd, int flag)
+{
+	int flags = ZTS_ERR_OK;
+	if ((flags = zts_fcntl(fd, F_GETFL, 0)) < 0) {
+		return ZTS_ERR_SOCKET;
+	}
+	return zts_fcntl(fd, F_SETFL, flags | ZTS_O_NONBLOCK);
+}
+
+int zts_py_getblocking(int fd)
+{
+	int flags = ZTS_ERR_OK;
+	if ((flags = zts_fcntl(fd, F_GETFL, 0)) < 0) {
+		return ZTS_ERR_SOCKET;
+	}
+	return flags & ZTS_O_NONBLOCK;
+}
+
+static int zts_py_tuple_to_sockaddr(int family,
 	PyObject *addr_obj, struct zts_sockaddr *dst_addr, int *addrlen)
 {
 	if (family == AF_INET) {
@@ -33,7 +51,7 @@ static int tuple_to_sockaddr(int family,
 			return ZTS_ERR_ARG;
 		}
 		if (!PyArg_ParseTuple(addr_obj,
-			"eti:tuple_to_sockaddr", "idna", &host_str, &port)) {
+			"eti:zts_py_tuple_to_sockaddr", "idna", &host_str, &port)) {
 			return ZTS_ERR_ARG;
 		}
 		addr = (struct zts_sockaddr_in*)dst_addr;
@@ -84,7 +102,7 @@ int zts_py_bind(int fd, int family, int type, PyObject *addr_obj)
 	struct zts_sockaddr_storage addrbuf;
 	int addrlen;
 	int err;
-	if (tuple_to_sockaddr(family, addr_obj,
+	if (zts_py_tuple_to_sockaddr(family, addr_obj,
 		(struct zts_sockaddr *)&addrbuf, &addrlen) != ZTS_ERR_OK)
 	{
 		return ZTS_ERR_ARG;
@@ -101,7 +119,7 @@ int zts_py_connect(int fd, int family, int type, PyObject *addr_obj)
 	struct zts_sockaddr_storage addrbuf;
 	int addrlen;
 	int err;
-	if (tuple_to_sockaddr(family, addr_obj,
+	if (zts_py_tuple_to_sockaddr(family, addr_obj,
 		(struct zts_sockaddr *)&addrbuf, &addrlen) != ZTS_ERR_OK)
 	{
 		return ZTS_ERR_ARG;
diff --git a/src/bindings/python/prototype.py b/src/bindings/python/prototype.py
deleted file mode 100644
index bac71ff..0000000
--- a/src/bindings/python/prototype.py
+++ /dev/null
@@ -1,103 +0,0 @@
-import libzt
-
-import time
-import struct
-import pprint
-pp = pprint.PrettyPrinter(width=41, compact=True)
-
-class zerotier():
-	# Create a socket
-	def socket(sock_family, sock_type, sock_proto=0):
-		return ztsocket(sock_family, sock_type, sock_proto)
-	# Convert libzt error code to exception
-	def handle_error(err):
-		if (err == libzt.ZTS_ERR_SOCKET):
-			raise Exception('ZTS_ERR_SOCKET (' + str(err) + ')')
-		if (err == libzt.ZTS_ERR_SERVICE):
-			raise Exception('ZTS_ERR_SERVICE (' + str(err) + ')')
-		if (err == libzt.ZTS_ERR_ARG):
-			raise Exception('ZTS_ERR_ARG (' + str(err) + ')')
-		# ZTS_ERR_NO_RESULT isn't strictly an error
-		#if (err == libzt.ZTS_ERR_NO_RESULT):
-		#	raise Exception('ZTS_ERR_NO_RESULT (' + err + ')')
-		if (err == libzt.ZTS_ERR_GENERAL):
-			raise Exception('ZTS_ERR_GENERAL (' + str(err) + ')')
-
-# ZeroTier pythonic low-level socket class
-class ztsocket():
-
-	_fd        = -1 # native layer file descriptor
-	_family    = -1
-	_type      = -1
-	_proto     = -1
-	_connected = False
-	_closed    = True
-	_bound     = False
-
-	def __init__(self, sock_family=-1, sock_type=-1, sock_proto=-1, sock_fd=None):
-		self._fd = sock_fd
-		self._family = sock_family
-		self._type = sock_type
-		self._family = sock_family
-		# Only create native socket if no fd was provided. We may have
-		# accepted a connection
-		if (sock_fd == None):
-			self._fd = libzt.zts_socket(sock_family, sock_type, sock_proto)
-
-	def has_dualstack_ipv6():
-		return True
-
-	@property
-	def family(self):
-		return _family
-	
-	@property
-	def type(self):
-		return _type
-
-	# Bind the socket to a local interface address
-	def bind(self, local_address):
-		err = libzt.zts_py_bind(self._fd, self._family, self._type, local_address)
-		if (err < 0):
-			zerotier.handle_error(err)
-
-	# Connect the socket to a remote address
-	def connect(self, remote_address):
-		err = libzt.zts_py_connect(self._fd, self._family, self._type, remote_address)
-		if (err < 0):
-			zerotier.handle_error(err)
-
-	# Put the socket in a listening state (with an optional backlog argument)
-	def listen(self, backlog):
-		err = libzt.zts_py_listen(self._fd, backlog)
-		if (err < 0):
-			zerotier.handle_error(err)
-
-	# Accept connection on the socket
-	def accept(self):
-		new_conn_fd, addr, port = libzt.zts_py_accept(self._fd)
-		if (new_conn_fd < 0):
-			zerotier.handle_error(acc_fd)
-			return None
-		return ztsocket(self._family, self._type, self._proto, new_conn_fd), addr
-
-	# Read data from the socket
-	def recv(self, n_bytes, flags=0):
-		err, data = libzt.zts_py_recv(self._fd, n_bytes, flags)
-		if (err < 0):
-			zerotier.handle_error(err)
-			return None
-		return data
-
-	# Write data to the socket
-	def send(self, data, flags=0):
-		err = libzt.zts_py_send(self._fd, data, len(data), flags)
-		if (err < 0):
-			zerotier.handle_error(err)
-		return err
-
-	# Close the socket
-	def close(self):
-		err = libzt.zts_py_close(self._fd)
-		if (err < 0):
-			zerotier.handle_error(err) 
diff --git a/src/bindings/python/sockets.py b/src/bindings/python/sockets.py
new file mode 100644
index 0000000..ac510fd
--- /dev/null
+++ b/src/bindings/python/sockets.py
@@ -0,0 +1,347 @@
+import libzt
+
+class EventCallbackClass(libzt.PythonDirectorCallbackClass):
+	pass
+
+# Convert libzt error code to exception
+def handle_error(err):
+	if (err == libzt.ZTS_ERR_SOCKET):
+		raise Exception('ZTS_ERR_SOCKET (' + str(err) + ')')
+	if (err == libzt.ZTS_ERR_SERVICE):
+		raise Exception('ZTS_ERR_SERVICE (' + str(err) + ')')
+	if (err == libzt.ZTS_ERR_ARG):
+		raise Exception('ZTS_ERR_ARG (' + str(err) + ')')
+	# ZTS_ERR_NO_RESULT isn't strictly an error
+	#if (err == libzt.ZTS_ERR_NO_RESULT):
+	#	raise Exception('ZTS_ERR_NO_RESULT (' + err + ')')
+	if (err == libzt.ZTS_ERR_GENERAL):
+		raise Exception('ZTS_ERR_GENERAL (' + str(err) + ')')
+
+# This implementation of errno is NOT thread safe
+# That is, this value is shared among all lower-level socket calls
+# and may change for any reason at any time if you have multiple
+# threads making socket calls.
+def errno():
+	return libzt.cvar.zts_errno
+
+# Start the ZeroTier service
+def start(path, callback, port):
+	libzt.zts_start(path, callback, port)
+
+# Stop the ZeroTier service
+def stop():
+	libzt.zts_stop()
+
+# [debug] Restarts the ZeroTier service and network stack
+def restart():
+	libzt.zts_restart()
+
+# Permenantly shuts down the network stack.
+def free():
+	libzt.zts_free()
+
+# Join a ZeroTier network
+def join(networkId):
+	libzt.zts_join(networkId)
+
+# Leave a ZeroTier network
+def leave(networkId):
+	libzt.zts_leave(networkId)
+
+# Orbit a moon
+def zts_orbit(moonWorldId, moonSeed):
+    return libzt.zts_orbit(moonWorldId, moonSeed)
+
+# De-orbit a moon
+def zts_deorbit(moonWorldId):
+    return libzt.zts_deorbit(moonWorldId)
+
+# Pythonic class that wraps low-level sockets
+class socket():
+
+	_fd        = -1 # native layer file descriptor
+	_family    = -1
+	_type      = -1
+	_proto     = -1
+	_connected = False
+	_closed    = True
+	_bound     = False
+
+	def __init__(self, sock_family=-1, sock_type=-1, sock_proto=-1, sock_fd=None):
+		self._fd = sock_fd
+		self._family = sock_family
+		self._type = sock_type
+		self._family = sock_family
+		# Only create native socket if no fd was provided. We may have
+		# accepted a connection
+		if (sock_fd == None):
+			self._fd = libzt.zts_socket(sock_family, sock_type, sock_proto)
+
+	def has_dualstack_ipv6():
+		return True
+
+	@property
+	def family(self):
+		return _family
+
+	@property
+	def type(self):
+		return _type
+
+	@property
+	def proto(self):
+		return _proto
+
+	# Intentionally not supported
+	def socketpair(self, family, type, proto):
+		raise NotImplementedError("socketpair(): libzt does not support AF_UNIX sockets")
+
+	# Convenience function to create a connection to a remote host
+	def create_connection(self, remote_address):
+		# TODO: implement timeout
+		conn = socket(libzt.ZTS_AF_INET, libzt.ZTS_SOCK_STREAM, 0)
+		conn.connect(remote_address)
+		return conn
+
+	# Convenience function to create a listening socket
+	def create_server(self, local_address, family=libzt.ZTS_AF_INET, backlog=None):
+		# TODO: implement reuse_port
+		conn = socket(libzt.ZTS_AF_INET, libzt.ZTS_SOCK_STREAM, 0)
+		conn.bind(local_address)
+		conn.listen(backlog)
+		return conn
+
+	def fromfd(self, fd, family, type, proto=0):
+		raise NotImplementedError("fromfd(): Not supported. OS File descriptors aren't used in libzt.")
+
+	def fromshare(self, data):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def close(self, fd):
+		raise NotImplementedError("close(fd): Not supported OS File descriptors aren't used in libzt.")
+
+	def getaddrinfo(self, host, port, family=0, type=0, proto=0, flags=0):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def getfqdn(self, name):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def gethostbyname(self, hostname):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def gethostbyname_ex(self, hostname):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def gethostname(self):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def gethostbyaddr(self, ip_address):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def getnameinfo(self, sockaddr, flags):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def getprotobyname(self, protocolname):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def getservbyname(self, servicename, protocolname):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def getservbyport(self, port, protocolname):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def ntohl(x):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def ntohs(x):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def htonl(x):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def htons(x):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def inet_aton(ip_string):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def inet_ntoa(packed_ip):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def inet_pton(address_family, ip_string):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def inet_ntop(address_family, packed_ip):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def CMSG_LEN(length):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def CMSG_SPACE(length):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def getdefaulttimeout(self):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def setdefaulttimeout(self, timeout):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def sethostname(self, name):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def if_nameindex(self):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def if_nametoindex(self, if_name):
+		raise NotImplementedError("if_nametoindex(): libzt does not name interfaces.")
+
+	def if_indextoname(self, if_index):
+		raise NotImplementedError("if_indextoname(): libzt does not name interfaces.")
+
+	# Accept connection on the socket
+	def accept(self):
+		new_conn_fd, addr, port = libzt.zts_py_accept(self._fd)
+		if (new_conn_fd < 0):
+			handle_error(new_conn_fd)
+			return None
+		return ztsocket(self._family, self._type, self._proto, new_conn_fd), addr
+
+	# Bind the socket to a local interface address
+	def bind(self, local_address):
+		err = libzt.zts_py_bind(self._fd, self._family, self._type, local_address)
+		if (err < 0):
+			handle_error(err)
+
+	# Close the socket
+	def close(self):
+		err = libzt.zts_py_close(self._fd)
+		if (err < 0):
+			handle_error(err)
+
+	# Connect the socket to a remote address
+	def connect(self, remote_address):
+		err = libzt.zts_py_connect(self._fd, self._family, self._type, remote_address)
+		if (err < 0):
+			handle_error(err)
+
+	# Connect to remote host but return low-level result code, and errno on failure
+	# This uses a non-thread-safe implementation of errno
+	def connect_ex(self, remote_address):
+		err = libzt.zts_py_connect(self._fd, self._family, self._type, remote_address)
+		if (err < 0):
+			return errno()
+		return err
+
+	def detach(self):
+		raise NotImplementedError("detach(): Not supported. OS File descriptors aren't used in libzt.")
+
+	def dup(self):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def fileno(self):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def get_inheritable(self):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def getpeername(self):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def getsockname(self):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def getsockopt(self, level, optname, buflen):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	# Get whether this socket is in blocking or non-blocking mode
+	def getblocking(self):
+		return libzt.zts_py_getblocking(self._fd)
+
+	def gettimeout(self):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def ioctl(self, control, option):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	# Put the socket in a listening state (with an optional backlog argument)
+	def listen(self, backlog):
+		err = libzt.zts_py_listen(self._fd, backlog)
+		if (err < 0):
+			handle_error(err)
+
+	def makefile(mode='r', buffering=None, *, encoding=None, errors=None, newline=None):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	# Read data from the socket
+	def recv(self, n_bytes, flags=0):
+		err, data = libzt.zts_py_recv(self._fd, n_bytes, flags)
+		if (err < 0):
+			handle_error(err)
+			return None
+		return data
+
+	def recvfrom(self, bufsize, flags):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def recvmsg(self, bufsize, ancbufsize, flags):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def recvmsg_into(self, buffers, ancbufsize, flags):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def recvfrom_into(self, buffer, nbytes, flags):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def recv_into(self, buffer, nbytes, flags):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	# Write data to the socket
+	def send(self, data, flags=0):
+		err = libzt.zts_py_send(self._fd, data, len(data), flags)
+		if (err < 0):
+			handle_error(err)
+		return err
+
+	def sendall(self, bytes, flags):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def sendto(self, bytes, address):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def sendto(self, bytes, flags, address):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def sendmsg(self, buffers, ancdata, flags, address):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def sendmsg_afalg(self, msg, *, op, iv, assoclen, flags):
+		raise NotImplementedError("sendmsg_afalg(): libzt does not support AF_ALG")
+
+	def send_fds(self, sock, buffers, fds, flags, address):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def recv_fds(self, sock, bufsize, maxfds, flags):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def sendfile(self, file, offset=0, count=None):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def set_inheritable(self, inheritable):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	# Set whether this socket is in blocking or non-blocking mode
+	def setblocking(self, flag):
+		libzt.zts_py_setblocking(self._fd, flag)
+
+	def settimeout(self, value):
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	def setsockopt(self, level, optname, value):
+		# TODO: value: buffer
+		# TODO: value: int
+		# TODO: value: None -> optlen required
+		raise NotImplementedError("libzt does not support this (yet?)")
+
+	# Shut down one or more aspects (rx/tx) of the socket
+	def shutdown(self, how):
+		libzt.shutdown(self._fd, how)