Re: Python: What Happens When This If Executes?
- From: Jim Dunleavy <jim.dunleavy@xxxxxx>
- To: programmingblind@xxxxxxxxxxxxx
- Date: Wed, 03 Nov 2010 11:10:44 +0000
Hi Jim,
The feature is called comparison chaining and is equivalent to
if board[row[0]] == board[row[1]] and board[row[1]] == board[row[2]] and
board[row[2]] != EMPTY:
except that the operands are only evaluated once.
It's covered in chapter 5 Expressions, of the Python reference.
--Jim
----- Original Message -----
From: Homme, James
To: programmingblind@xxxxxxxxxxxxx
Sent: Tuesday, November 02, 2010 2:42 PM
Subject: Python: What Happens When This If Executes?
Hi,
I understand that this statement compares three values to see if they are the
same, and that they are not the value called Empty, which is a global variable
filled with a space, but how does it do this?
if board[row[0]] == board[row[1]] == board[row[2]] != EMPTY:
Thanks.
Jim
Jim Homme,
Usability Services,
Phone: 412-544-1810. Skype: jim.homme
Internal recipients, Read my accessibility blog. Discuss accessibility here.
Accessibility Wiki: Breaking news and accessibility advice
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