[Tutor] Re: Creating an object with a string

[Riccardo Lemmi]

Martin Hjort Eriksen wrote:

> I am parsing an XML file, and based on certain tags, i want to create
> certain objects. During the parsing i generate a string, with which i
> determine what type of object I want to create. The simple way is to
> have som if statements to determine it, but I was wondering if there is
> not a more "smart" method. I also do lot of PHP programming, where it is
> possible to do:
> 
> <?php
> $object = "ClassToCreate";
> 
> $newObject = new $object();
> 
> ?>
> 
> In that way I am able to with very few lines, to create an object based
> on a string. Is there any way of doing something similar in Python?
> 
> regards
> 
> Martin Hjort Eriksen
> 

>From shell:
>>> class ClassToCreate:
...     pass
...
>>> newObject = globals()['ClassToCreate']()
>>> newObject
<__main__.ClassToCreate instance at 0x4029e98c>
>>>

If you use a module, for example:
>>> import UserDict
>>> ClassToCreate = getattr(UserDict,'UserDict')
>>> x=ClassToCreate()
>>> x
{}
>>>
-- 

                             Riccardo Lemmi