Suggestions for good programming practices?

[Chris Barker]

Aahz wrote:
> Depends on what you're testing for.

Exactly. I hardly ever use None to mean false, I tend to use it to mean,
well, "none", or nothing there, as it a value that is not defined yet or
doesn't exist.

> object model is that any "empty" object tests as false: None, 0, "", (),
> [], and {}.

That's part of the problem for me, when I am using numbers, 0 (or 0.0)
is as often as not a perfectly valid number, and should not be
interpreted as false. However as someone mentioned: 

if x is None

is preferabale to 

if x == None

What you want to know is whether x is bound to None so that's what you
should check for.

-Chris


-- 
Christopher Barker, Ph.D.
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