On 24/04/2019 00:31, Bob Griffin wrote:
> Python 3.1.1 (r311:74483, Aug 17 2009, 17:02:12) [MSC v.1500 32 bit (Intel)]
> on win32
> Type "copyright", "credits" or "license()" for more information.
print("Game Over")
> Game Over
> When I run the program and get a syntac error invalid syn
Python 3.1.1 (r311:74483, Aug 17 2009, 17:02:12) [MSC v.1500 32 bit (Intel)] on
win32
Type "copyright", "credits" or "license()" for more information.
>>> print("Game Over")
Game Over
>>>
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Each time I write the program in Python from the book Python Programming, Thi
On 23/04/19 10:08 PM, Steven D'Aprano wrote:
On Tue, Apr 23, 2019 at 08:27:15PM +0530, Arup Rakshit wrote:
You probably want:
def __init__(self, list=None):
if list is None:
list = []
self.list = list
That is really a new thing to me. I didn't know. Why
On 23/04/2019 15:52, Arup Rakshit wrote:
> If I replace __getattr__ with __getattribute__ I found the program works
> exactly same. Now my questions is in real world when you have to pick
> between these 2 pair of special method which protocols a Python dev
> checks to pick either of the one?
Arup Rakshit wrote:
> I read today 2 methods regarding the customizing the attribute
> access:__getattr__ and __getattribute__ from
> https://docs.python.org/3/reference/datamodel.html#special-method-names.
> What I understood about them is that __getattr__ is called when the
> requested attribute
On Tue, Apr 23, 2019 at 08:22:56PM +0530, Arup Rakshit wrote:
> I read today 2 methods regarding the customizing the attribute
> access:__getattr__ and __getattribute__ from
> https://docs.python.org/3/reference/datamodel.html#special-method-names.
> What I understood about them is that __getatt
On Tue, Apr 23, 2019 at 08:27:15PM +0530, Arup Rakshit wrote:
> >You probably want:
> >
> > def __init__(self, list=None):
> > if list is None:
> > list = []
> > self.list = list
>
> That is really a new thing to me. I didn't know. Why list=None in the
> param
On 4/23/19 8:57 AM, Arup Rakshit wrote:
> On 23/04/19 3:40 PM, Steven D'Aprano wrote:
>> Watch out here, you have a mutable default value, that probably doesn't
>> work the way you expect. The default value is created ONCE, and then
>> shared, so if you do this:
>>
>> a = MyCustomList() # Use the
I read today 2 methods regarding the customizing the attribute
access:__getattr__ and __getattribute__ from
https://docs.python.org/3/reference/datamodel.html#special-method-names.
What I understood about them is that __getattr__ is called when the
requested attribute is not found, and an Attri
On 23/04/19 3:40 PM, Steven D'Aprano wrote:
Watch out here, you have a mutable default value, that probably doesn't
work the way you expect. The default value is created ONCE, and then
shared, so if you do this:
a = MyCustomList() # Use the default list.
b = MyCustomList() # Shares the same de
On Tue, Apr 23, 2019 at 11:46:58AM +0530, Arup Rakshit wrote:
> Hi,
>
> I wrote below 2 classes to explore how __getitem__(self,k) works in
> conjuection with list subscriptions. Both code works. Now my questions
> which way the community encourages more in Python: if isinstance(key,
> slice):
On 23/04/2019 07:16, Arup Rakshit wrote:
> which way the community encourages more in Python: if isinstance(key,
> slice): or if type(key) == slice: ?
I think isinstance is usually preferred although I confess
that I usually forget and use type()... But isinstance covers
you for subclasses too.
Hi,
I wrote below 2 classes to explore how __getitem__(self,k) works in
conjuection with list subscriptions. Both code works. Now my questions
which way the community encourages more in Python: if isinstance(key,
slice): or if type(key) == slice: ? How should I implement this if I
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