don't understand instanse creation
Maksim Kasimov
maksim.kasimov at gmail.com
Tue Aug 9 10:24:11 EDT 2005
i see, thaks you very match!
Dan Sommers wrote:
> On Tue, 09 Aug 2005 16:39:51 +0300,
> Maksim Kasimov <maksim.kasimov at gmail.com> wrote:
>
>
>>Hello,
>
>
>>i have a class, such as below.
>>when i try to make instances of the class,
>>fields __data1 and __data2 gets different values: __data1 behaves like private field, __data2 - like static
>>which is the thing i've missed?
>
>
>>thanks for help.
>
>
>>====================================================
>
>
>
>>import time
>>class my:
>
>
>> __data1 = []
>> __data2 = []
>
>
>> def __init__(self):
>
>
>> print "__data1: ", self.__data1
>> print "__data2: ", self.__data2
>
>
>> for i in time.localtime():
>> self.__data2.append(i)
>
>
> The above line changes the existing class attribute __data2, which is
> shared by all instances of this class.
>
>
>> self.__data1 = self.__data2[:]
>
>
> The above line creates a new instance attribute __data1, and binds it to
> a copy of __data2.
>
>
>> print "__data1: ", self.__data1
>> print "__data2: ", self.__data2
>
>
> [ example snipped ]
>
> HTH,
> Dan
>
--
Best regards,
Maksim Kasimov
mailto: maksim.kasimov at gmail.com
More information about the Python-list
mailing list