dynamically modify help text

[Chris Kaynor]

On Mon, Jun 28, 2010 at 1:13 PM, Emile van Sebille <emile at fenx.com> wrote:

> On 6/28/2010 12:02 PM Benjamin Kaplan said...
>
>  Just to save the OP some trouble later on: this optimization is done
>> for most of the __*__ methods. Overriding __add__ on an instance won't
>> change the behavior of a + b.
>>
>
> ActivePython 2.4.1 Build 247 (ActiveState Corp.) based on
> Python 2.4.1 (#65, Jun 20 2005, 17:01:55) [MSC v.1310 32 bit (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> class Test: pass
> ...
> >>> i = Test()
> >>> i+1
> Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
> TypeError: unsupported operand type(s) for +: 'instance' and 'int'
> >>> def __add__(self): return 6
> ...
> >>> i.__add__ = __add__
> >>> i+1
> 6
> >>>
>
> Was this in reference to a specific python version?
>

That limitation only applies to new-style classes. (The stuff below is from
Python 2.6x86 on Windows, but should apply to your 2.4.1 as well).

>>> class Test(object): pass
...
>>> i = Test()
>>> i + 1
Traceback (most recent call last):
  File "<stdin-inspect>", line 1, in <module>
TypeError: unsupported operand type(s) for +: 'Test' and 'int'
>>> def __add__(self): return 6
...
>>> i.__add__ = __add__
>>> i + 1
Traceback (most recent call last):
  File "<stdin-inspect>", line 1, in <module>
TypeError: unsupported operand type(s) for +: 'Test' and 'int'
>>>

Chris

>
> Emile
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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