Inheritance - Michigan Python Users Group

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From: Ryan Burns <rdbu...@gmail.com>
Date: Tue, 10 Jul 2012 15:18:32 -0400
Message-ID: <CAKbMJAvqhw3xcZ-87NkswBt+5==xQNEm9f3Ye-WLAud0e8h...@mail.gmail.com>
Subject: Re: Inheritance
To: michipug@googlegroups.com
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Ahaha, the ftplib.FTP class is an old style class in the 2.6 release.

Huh, I checked both the 2.6.8 and 2.7.3 ftplib source and it's an old style
class in both.  I'm not sure why it worked for me.


You can still use ftplib.FTP.__init__(self)      - super() only really
matters if you have multiple inheritance (feel free to disabuse me of that
notion if it's not the case).


-Ryan



On Tue, Jul 10, 2012 at 3:11 PM, Ryan Burns <rdbu...@gmail.com> wrote:

> I tried this exact code;
>
> import ftplib
> class MyFTP(ftplib.FTP):
>     def __init__(self):
>         super(MyFTP,self).__init__()
>
>
> And it didn't throw any errors.  A quick google indicated this error can
> occur if the parent class you are inheriting from is not a new-style class.
>  I'm not sure why that would be the case in your case, although I am on
> 2.7.
>
>
>
> On Tue, Jul 10, 2012 at 3:02 PM, Nancy <eclecticna...@gmail.com> wrote:
>
>> Also I should have mentioned (though don't think it's been a factor yet):
>>
>> Py 2.6 on Win
>>
>> -Nancy
>> On Jul 10, 2012 2:57 PM, "Nancy" <eclecticna...@gmail.com> wrote:
>>
>>>
>>> I appreciate the feedback! So far, now, I have:
>>>
>>> import ftplib
>>> class MyFTP(ftplib.FTP):
>>>     def __init__(self):
>>>         pass
>>>
>>> I do plan to do some "custom" but am not there yet :)
>>>
>>> I did try this (in place of "pass"):  super(MyFTP, self).__init__()
>>> TypeError: super() argument 1 must be type, not classobj
>>>
>>> Thanks again,
>>> -Nancy
>>>
>>>
>>>
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>
>
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Ahaha, the ftplib.FTP class is an old style class in the 2.6 release.<div><=
br></div><div>Huh, I checked both the 2.6.8 and 2.7.3 ftplib source and it&=
#39;s an old style class in both. =A0I&#39;m not sure why it worked for me.=
</div>

<div><br></div><div><br></div><div>You can still use ftplib.FTP.__init__(se=
lf) =A0 =A0 =A0- super() only really matters if you have multiple inheritan=
ce (feel free to disabuse me of that notion if it&#39;s not the case).</div=
>
<div>
<br></div><div><br></div><div>-Ryan</div><div><br></div><div><br><br><div c=
lass=3D"gmail_quote">On Tue, Jul 10, 2012 at 3:11 PM, Ryan Burns <span dir=
=3D"ltr">&lt;<a href=3D"mailto:rdbu...@gmail.com" target=3D"_blank">rdburns=
@gmail.com</a>&gt;</span> wrote:<br>

<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">I tried this exact code;<div><br></div><div>=
<div class=3D"im"><div>import ftplib</div><div>class MyFTP(ftplib.FTP):</di=
v>

<div>=A0 =A0 def __init__(self):</div></div><div>=A0 =A0 =A0 =A0 super(MyFT=
P,self).__init__()</div><div>=A0 =A0=A0</div><div><br></div><div>And it did=
n&#39;t throw any errors. =A0A quick google indicated this error can occur =
if the parent class you are inheriting from is not a new-style class. =A0I&=
#39;m not sure why that would be the case in your case, although I am on 2.=
7. =A0</div>

<div><div class=3D"h5">
<div><br></div><div><br></div><br><div class=3D"gmail_quote">On Tue, Jul 10=
, 2012 at 3:02 PM, Nancy <span dir=3D"ltr">&lt;<a href=3D"mailto:eclecticna=
n...@gmail.com" target=3D"_blank">eclecticna...@gmail.com</a>&gt;</span> wro=
te:<br>


<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><p>Also I should have mentioned (though don&=
#39;t think it&#39;s been a factor yet):</p>
<p>Py 2.6 on Win</p><span><font color=3D"#888888">
<p>-Nancy</p></font></span><div><div>
<div class=3D"gmail_quote">On Jul 10, 2012 2:57 PM, &quot;Nancy&quot; &lt;<=
a href=3D"mailto:eclecticna...@gmail.com" target=3D"_blank">eclecticnancy@g=
mail.com</a>&gt; wrote:<br type=3D"attribution"><blockquote class=3D"gmail_=
quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1=
ex">



<div>=A0</div>
<div>I appreciate the feedback! So far, now, I have:</div>
<div>=A0</div>
<div>import ftplib<br>class MyFTP(ftplib.FTP):<br>=A0=A0=A0 def __init__(se=
lf):<br>=A0=A0=A0=A0=A0=A0=A0 pass<br></div>
<div>=A0</div>
<div>I do plan to do some &quot;custom&quot; but am not there yet :)</div>
<div>=A0</div>
<div>I did try this=A0(in place of &quot;pass&quot;):=A0 super(MyFTP, self)=
.__init__()</div>
<div>TypeError: super() argument 1 must be type, not classobj</div>
<div>=A0</div>
<div>Thanks again,</div>
<div>-Nancy</div>
<div><br>=A0</div>

<p></p>

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