Re: python: what's with the underscores?
- From: Tyler Littlefield <tyler@xxxxxxxxxxxxx>
- To: programmingblind@xxxxxxxxxxxxx
- Date: Sun, 27 Dec 2009 15:56:15 -0700
the __init__(self) is basically the constructer. it gets called when you create
a new object of that type. I believe there's a destructer-type, as well.
On Dec 27, 2009, at 3:46 PM, R Dinger wrote:
> Python does not have constructors like C++. It does have a function named
> __init__, which serves as an initializer function for initializing objects.
> But there can only be one of them.
>
> Self is similar to "this" in C++, but is always explicitly stated and, of
> course, like C++ refers to the underlying object instance.
>
> Richard
> ----- Original Message ----- From: "Alex Hall" <mehgcap@xxxxxxxxx>
> To: <programmingblind@xxxxxxxxxxxxx>
> Sent: Sunday, December 27, 2009 2:13 PM
> Subject: Re: python: what's with the underscores?
>
>
>> Okay, but (A) I did not think Python had constructor methods and (B) why do
>> I always see methodName(self): like in your example?
>>
>>
>> Have a great day,
>> Alex
>> New email address: mehgcap@xxxxxxxxx
>> ----- Original Message ----- From: "edward" <personal.edward@xxxxxxxxx>
>> To: <programmingblind@xxxxxxxxxxxxx>
>> Sent: Sunday, December 27, 2009 17:11
>> Subject: RE: python: what's with the underscores?
>>
>>
>>> Two underscores signify either a constructor method or a built in method I
>>> think. Like the str method. If you want to define string formatting with
>>> your class its defined by two underscores before and after the method name.
>>> example __str__(self):
>>>
>>>
>>> -----Original Message-----
>>> From: programmingblind-bounce@xxxxxxxxxxxxx
>>> [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Alex Hall
>>> Sent: Sunday, December 27, 2009 3:58 PM
>>> To: Blind Programming List
>>> Subject: python: what's with the underscores?
>>>
>>> In python, why are some method names surrounded by two underscores? Even
>>> some filenames have these two underscores, though I imagine that is more of
>>> a convention than anything else. What do the underscores mean, if anything?
>>>
>>>
>>> Have a great day,
>>> Alex
>>> New email address: mehgcap@xxxxxxxxx
>>>
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