Am 02.01.2012 14:25, schrieb Νικόλαος Κούρας:
On 23 Δεκ 2011, 19:14, Νικόλαος Κούρας<nikos.kou...@gmail.com>  wrote:
I dont know why this line host =
socket.gethostbyaddr( os.environ['REMOTE_ADDR'] )[0] fails sometimes
and some other times works ok retrieving the hostnames correctly.

Please i need some help. My webpage doesn't work due to this error...

The error "herror: (1, ...)" says it all: the DNS-name (i.e., the <something>.in-addr.arpa name) you're trying to resolve is unknown. Not all hosts (or rather, IPs) on the internet have reverse lookups: try the IP 81.14.209.35 from which I'm posting, and dig/nslookup will tell you that it has no reverse resolution, which would result in gethostbyaddr() throwing an herror-instance.

Basically: make the reverse lookup conditional by wrapping it in a try:/except herror: and assigning an appropriate default for host in case reverse lookup fails.

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