human
close socket connection.
assistant
Here is a Python function to close socket connection

import socket

def close_socket(sock):
    """
    Close a socket connection.
    """
    sock.close()

# Enter the socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Calling the function
print((close_socket(sock)))

#Example Output
# None

#Remember to inspect code for bugs.