How do I get my computer's fully qualified domain name in Python?

In Python, obtaining the fully qualified domain name (FQDN) of a computer can be achieved using the socket module from the standard library. Here is a simple example:

python
import socket

def get_fqdn():
    # Retrieve the local hostname
    hostname = socket.gethostname()
    # Retrieve the fully qualified domain name
    fqdn = socket.getfqdn(hostname)
    return fqdn

# Output the fully qualified domain name
print(get_fqdn())

In this code snippet, the socket module is first imported, and a get_fqdn function is defined. Inside the function, the local hostname is retrieved using socket.gethostname(), and the hostname is converted to its fully qualified domain name using the socket.getfqdn() method. Finally, the function returns this FQDN.

This method is typically cross-platform and can run on various operating systems, including Windows, Linux, and macOS.