Can print() be reloaded for a user defined class?

Dave Angel davea at ieee.org
Sun Sep 20 16:19:39 CEST 2009


Peng Yu wrote:
> <snip>
>> you might use:
>>     
>
> Is __repr__ =_str__ copy by reference or by value? If I change
> __str__ later on, will __repr__ be changed automatically?
>
> Regards,
> Peng
>
>   
>
Reference or value?  Neither one.  This assignment is no different than 
any other attribute assignment in Python.  Technically, it binds the 
name __repr__ to the function object already bound by __str__.  You now 
have a second name pointing to the same object.  Rebinding one of those 
names  to yet another different object won't affect the other name.

name1 = "this is a test"
name2 = name1
name1 = "another string"           #this has no effect on name2

print name1, name2

DaveA




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