problems with Methods in Python 3.4.2

[Gary Herron]

On 12/18/2014 09:27 AM, Marcus Lütolf wrote:
>
> Hello Dears,
>
> 1)I am trying to do this:
>
> >>> dir(_builtins_)
>

It's __builtins__ not _builtins_  (double underscores at each end not 
single underscores)
>
> I am getting this:
>
> Traceback (most recent call last):
>
> File "<pyshell#0>", line 1, in <module>
>
>     dir(_builtins_)
>
> NameError: name '_builtins_' is not defined
>
> 2)I am trying to do this:
>
> >>> 'TTA',_add_('GGA')
>

To call a method use "." not ",".   And the method you are trying to 
call is __add__ not _add_.  But why... just do "TTA"+"GGA"
>
> I’am getting this :
>
> Traceback (most recent call last):
>
> File "<pyshell#0>", line 1, in <module>
>
> 'TTA',_add_('GGA')
>
> NameError: name '_add_' is not defined
>
> 3)I am trying to do this:
>
> >>> -3  .abs()
>

abs is a function not a method.  do: abs(-3)

> I’am getting this
>
> Traceback (most recent call last):
>
>   File "<pyshell#1>", line 1, in <module>
>
>     -3 .abs()
>
> AttributeError: 'int' object has no attribute 'abs'
>
> 4) finally, after printing
>
> >>>abs._doc_()
>

Again, use double underscores abs.__doc__()

> I am getting this (and so on) :
>
> Traceback (most recent call last):
>
>   File "<pyshell#2>", line 1, in <module>
>
> abs._doc_()
>
> AttributeError: 'builtin_function_or_method' object has no attribute 
> '_doc_'
>
> What did I do wrong ? Thanks for help, Marcus Luetolf, M.D., 90 
> Bondastreet, CH-7000 Chur, Switzerland.
>
>

-- 
Dr. Gary Herron
Department of Computer Science
DigiPen Institute of Technology
(425) 895-4418

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