Working socket() program...isn't

[nilamo]

Support for using sockets with the context manager (with-block) was added in 3.2. You said you've checked that they're both at least 3.6, but could you double check the python versions involved?

I wouldn't think that'd be the issue, though, as the error would probably mention __enter__ instead of __exit__.

Do you happen to have a file named "socket.py" in your path? Maybe you're importing the wrong thing...