Why do some attributes start with '@' while others done't?

[Chris Wright via Digitalmars-d]

On Fri, 22 Jan 2016 15:00:11 -0800, H. S. Teoh via Digitalmars-d wrote:

> On Fri, Jan 22, 2016 at 10:11:45PM +0000, Ola Fosheim Grøstad via
> Digitalmars-d wrote:
>> On Friday, 22 January 2016 at 19:10:38 UTC, H. S. Teoh wrote:
>> >I work with Python code without an IDE, and I manage just fine. As
>> >long as you're consistent with how you use tabs vs. spaces, it's not a
>> >problem.
>> 
>> Yes, if you use the same editor and reformat source files you download
>> before editing them. I have found it to be more convenient to use an
>> editor that auto detects common mistakes (not unique for Python
>> though).
> 
> Why do you need to reformat source files you download? Just follow the
> formatting conventions of the surrounding code and you'll save yourself
> a whole lot of headache.

Because my text editor is set up with particular indentation settings and 
isn't good at autodetecting what's in use. Since this is a partially 
invisible aspect of formatting, it's safer to reformat files when I 
download them.

I mean, sure, I can check manually when I start editing the file. And 
then I close the file for a moment to go back to the command line because 
I forgot to use tmux, and then I go back to the file, and since it's been 
half an hour I forgot about tabs versus spaces and now I'm introducing 
indentation errors again.

Reformatting aggressively solves this problem.