working examples

client.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+
+import socket
+
+client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)  # UDP
+
+# Enable port reusage so we will be able to run multiple clients and servers on single (host, port).
+# Do not use socket.SO_REUSEADDR except you using linux(kernel<3.9): goto https://stackoverflow.com/questions/14388706/how-do-so-reuseaddr-and-so-reuseport-differ for more information.
+# For linux hosts all sockets that want to share the same address and port combination must belong to processes that share the same effective user ID!
+# So, on linux(kernel>=3.9) you have to run multiple servers and clients under one user to share the same (host, port).
+# Thanks to @stevenreddie
+# client.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
+
+# Enable broadcasting mode
+client.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
+
+client.bind(("192.168.1.101", 37020))
+while True:
+    # Thanks @seym45 for a fix
+    data, addr = client.recvfrom(1024)
+    # print("received message: %s" % data.decode("utf8"))
+    print(f"from: {addr}, recive: {data}")