[Tutor] object orientation

[Gregor Lingl]

Alan Gauld schrieb:

>>to know why we write len(x) instead of x.len() 
>>    
>>
>
>There was a thread about this a fw weeks ago 
>- either here or comp.lang.python.
>
>I think history is the real answer. When Guido first built Python 
>not everything (strings, ints, floats etc) were first class 
>objects so making len() a function meant it was more generally 
>useful. Nowadays len() could just as well be an object method.
>  
>
And, in fact, behind the scene it is:

 >>> "abc".__len__()
3
 >>> [].__len__()
0
 >>>

Regards,
Gregor

>Alan G.
>
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