echo server example in Python with new async/await.

examples/python-echo/.gitignore

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+*.o
+.flavor
+.objs
+python-echo
+assets.h
+cert

examples/python-echo/conf/build.conf

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+# python-echo build config
+# You can switch flavors using: kodev flavor [newflavor]
+
+# Set to yes if you wish to produce a single binary instead
+# of a dynamic library. If you set this to yes you must also
+# set kore_source together with kore_flavor.
+single_binary=yes
+kore_source=../../
+kore_flavor=NOTLS=1 PYTHON=1
+
+# The flags below are shared between flavors
+cflags=-Wall -Wmissing-declarations -Wshadow
+cflags=-Wstrict-prototypes -Wmissing-prototypes
+cflags=-Wpointer-arith -Wcast-qual -Wsign-compare
+
+cxxflags=-Wall -Wmissing-declarations -Wshadow
+cxxflags=-Wpointer-arith -Wcast-qual -Wsign-compare
+
+# Mime types for assets served via the builtin asset_serve_*
+#mime_add=txt:text/plain; charset=utf-8
+#mime_add=png:image/png
+#mime_add=html:text/html; charset=utf-8
+
+dev {
+	# These flags are added to the shared ones when
+	# you build the "dev" flavor.
+	cflags=-g
+	cxxflags=-g
+}
+
+#prod {
+#	You can specify additional flags here which are only
+#	included if you build with the "prod" flavor.
+#}

examples/python-echo/conf/python-echo.conf

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+# python-echo configuration
+
+python_import	src/echo.py

examples/python-echo/src/echo.py

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+#
+# Copyright (c) 2013-2018 Joris Vink <joris@coders.se>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+
+import kore
+import socket
+
+class EchoServer:
+    # Setup socket + wrap it inside of a kore socket so we can use it.
+    def __init__(self):
+        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        sock.setblocking(False)
+        sock.bind(("127.0.0.1", 6969))
+        sock.listen()
+
+        self.conn = kore.socket_wrap(sock)
+
+    # Wait for a new client to connect, then create a new task
+    # that calls handle_client with the ocnnected client as
+    # the argument.
+    async def run(self):
+        while True:
+            try:
+                client = await self.conn.accept()
+                kore.task_create(self.handle_client(client))
+                client = None
+            except Exception as e:
+                kore.fatal("exception %s" % e)
+
+    # Each client will run as this co-routine.
+    async def handle_client(self, client):
+        while True:
+            try:
+                data = await client.recv(1024)
+                if data is None:
+                    break
+                await client.send(data)
+            except Exception as e:
+                print("client got exception %s" % e)
+        client.close()
+
+# Setup the server object.
+server = EchoServer()
+
+# Create a task that will execute inside of Kore as a co-routine.
+kore.task_create(server.run())