sockets - Python Script Fails to Get IP from a List of Hostnames -

here code:

    import socket import csv  open('afile.csv','r') csv:     a_csv = csv.reader(csv)     next(a_csv)     csvlist = list(a_csv) count = 0 row in csvlist:     if count == len(csvlist):         count = len(csvlist)-1     hostname = socket.gethostbyname(csvlist[count][0])     count += 1 

the error i'm getting through interpreter: socket.gaierror: [errno 11001] getaddrinfo failed

the purpose of little python script loop through list generated form csv file, extract hostname , lookup ip address. once it's done should add list right after original hostname (i have open "space" within csv this). question maybe causing error occur?