Expand a list of IP addresses with Python 3

addresses.py

from ipaddress import ip_network                                                                                                                                                                                                                                              
                                                                                                                                                                                                                                                                              
ip_ranges = [                                                                                                                                                                                                                                                                 
    '192.168.1.0/24',                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
]                                                                                                                                                                                                                                                                             
                                                                                                                                                                                                                                                                              
with open('whitelisted.csv', 'w') as f:                                                                                                                                                                                                                                       
    for ip_range in ip_ranges:                                                                                                                                                                                                                                                
        net = ip_network(ip_range)                                                                                                                                                                                                                                            
        for ip in net:                                                                                                                                                                                                                                                        
            f.write(str(ip) + '\n')