Fwd: class print method...

[Suresh Sharma]

Dave / Ryan
Thanks i have got it and it worked after using repr statement. Thanks
everyone for their valuable feedback.



On Mon, Dec 5, 2011 at 6:11 PM, Lie Ryan <lie.1296 at gmail.com> wrote:

> On 12/05/2011 10:18 PM, Suresh Sharma wrote:
>
>>
>> Pls help its really frustrating
>> ---------- Forwarded message ----------
>> From: Suresh Sharma
>> Date: Monday, December 5, 2011
>> Subject: class print method...
>> To: "d at davea.name <mailto:d at davea.name>" <d at davea.name
>> <mailto:d at davea.name>>
>>
>>
>> Dave,
>> Thanx for the quick response, i am sorry that i did not explain
>> correctly look at the code below inspite of this i am just getting class
>> object at memory location.I am sort i typed all this code on my android
>> in a hurry so.indentation could.not.be.managed but this.similar code
>> when i run all my objects created by class deck are not shown but stored
>> in varioia meory locations. How can i display them.
>>
>>
> I think you're in the right track, however I suspect you're running the
> code in the shell instead of as a script. The shell uses __repr__() to
> print objects instead of __str__(), so you either need to use 'print' or
> you need to call str(), note the following:
>
> Python 2.7.2+ (default, Oct  4 2011, 20:06:09)
> [GCC 4.6.1] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> suits = ['spades', 'clubs', 'diamonds', 'hearts']
> >>> ranks = ['A', '2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q',
> 'K']
> >>> class Card:
> ...     def __init__(self, rank, suit):
> ...         self.suit = suit
> ...         self.rank = rank
> ...     def __str__(self):
> ...         return suits[self.suit] + ' ' + ranks[self.rank]
> ...
> >>> Card(2, 3) #1
> <__main__.Card instance at 0x7f719c3a20e0>
> >>> str(Card(2, 3)) #2 of your
> 'hearts 3'
> >>> print Card(2, 3) #3
> hearts 3
>
> In #1, the output is the __repr__() of your Card class; you can modify
> this output by overriding the __repr__() on your Card class.
>
> In #2, the output is the __repr__() of a string, the string is the return
> value from __str__() of your Card class. The repr of a string is the string
> enclosed in quotes, which is why there is an extra pair of quotes.
>
> In #3, you're 'print'-ing a string, the string is the return value from
> __str__() of your Card class. There's no extra quotes, since 'print' prints
> the string itself, not the repr of the string.
>
> --
> http://mail.python.org/**mailman/listinfo/python-list<http://mail.python.org/mailman/listinfo/python-list>
>



-- 
Suresh Sharma
Regional Project Manager,
O2F,Mumbai
Maharashtra-400101.
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