On 02Jun2019 17:49, Chris Angelico <ros...@gmail.com> wrote:
On Sun, Jun 2, 2019 at 5:17 PM Markus Elfring <markus.elfr...@web.de> wrote:
>> How would like to explain the error message “socket.gaierror:
>> [Errno -9]
>> Address family for hostname not supported” on my Linux test system then?
>
> Can you supply a tiny standalone piece of code demonstrating this error
please?
The following script part would be relevant.
…
def send_data(x):
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as so:
global args
so.connect((args.server_id, args.server_port))
…
If the address family “AF_INET6” was passed instead, the identification “::1”
can work also as a command parameter.
The data transmission seems to succeed by my script “socket-send_json_data2.py”
then.
May I recommend using this function instead? It'll be easier to handle
both IPv4 and IPv6:
https://docs.python.org/3/library/socket.html#socket.create_connection
I think I'm with Chris here: by using AF_INET you're saying "IPv4 only
please". "::1" is not an IPv4 address. hence your error. It's not called
"AF_INET4" because it predates IPv6.
The function Chris has suggested to you tries both IPv4 and IPv6.
Cheers,
Cameron Simpson <c...@cskk.id.au>
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