Simple UDP Client in Python

A Python UDP client is not much different than a TCP client; we need to make only two small changes to get it to send packets in UDP form.

import socket

target_host = "127.0.0.1"
target_port = 80

client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
client.sendto(b"AAABBBCCC", (target_host, target_port))
data, addr = client.recvfrom(4096)
print(data.decode())

• As you can see, we change the socket type to SOCK_DGRAM when creating the socket object.
• The next step is to simply call sendto(), passing in the data and the server you want to send the data to.
• Because UDP is a connectionless protocol, there is no call to connect() beforehand.
• The last step is to call recvfrom() to receive UDP data back.
• You will also notice that it returns both the data and the details of the remote host and port.