This is the second time I've run into this really weird issue on Mac OS X where attempting to run a Python program that uses
socket.gethostname() results in
[Errno 1] Unknown host.
In this case, I was setting up and running TouRSSt, an RSS to Maildir program:
$ ./toursst Checking feed Raam Dev Refreshing... ./toursst: error while fetching https://raamdev.com/feed/: [Errno 1] Unknown host.
I was baffled. Why is
raamdev.com an "Unknown host"?
After nearly forty minutes of Googling and looking through the code, I finally came across a suggestion to add the local hostname of my computer to my
/etc/hosts file and point it at the localhost IP address (
127.0.0.1). And it worked!
First, get the local hostname by running the
$ hostname Raams-MacBook-Air.local
Then add that to your
/etc/hosts (you'll need to be
sudo to edit that file) and point that hostname to the localhost IP address
127.0.0.1. You should add a new line that looks something like this:
Now running the Python program works properly!
$ ./toursst Checking feed Raam Dev Refreshing...