On Wed, Feb 2, 2011 at 7:23 PM, John Parker <park...@gmail.com> wrote:
> All,
>
> I have written this test code
>
> if (card == "Hearts" or card == "Diamonds"):
> print "That card is Red"
>
> elif (card == "Spades" or card == "Clubs"):
> print "That card is Black"
Note that the parentheses are completely unnecessary and not idiomatic style.
if card == "Hearts" or card == "Diamonds":
is the normal way of writing compound conditions.
> It seems to work but prior to this code, it looked like this
>
> if (card == "Hearts" or card == "Diamonds"):
> print "That card is Red"
>
> elif (card == "Spades" or card == "Clubs")
> print "That card is Black"
>
> Which didn't work. Can someone set me straight because in class
>
> The teacher gave an example like this which worked
> if (favcolor == "Red"):
> print "Roses are Red"
>
> elif (favcolor == "Blue"
> print "Violets are Blue"
I can assure you that such code does not work. Either the example was
incorrect or there is some other key difference you accidentally
omitted. The colons are absolutely required.
> So, why did I have to add a second : after my code for spades or clubs?
All Python control structures require a colon.
The general form is:
<control keyword> <stuff>:
<body>
In the specific case of if-elif-else, we have:
if condition:
do_something
elif other_condition:
do_something_else
else:
do_a_third_thing
All the colons are always mandatory.
Also, your question isn't Mac-specific, so for future reference, it
would have been better posed to the more general and widely-read
python-list (http://mail.python.org/mailman/listinfo/python-list ).
Cheers,
Chris
--
http://blog.rebertia.com
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