Re: [Jython-users] Class name reflection?

[Kevin J. B. <jyt...@sa...>]

 > From: Danny Yoo <dy...@hk...>

>On Mon, 17 Nov 2003, Frank Cohen wrote:
>  
>
>>Is there a way to instantiate a class where the name of the class is an
>>element in a list. Here's what I am after:
>>
>>class a:
>>     def __init__( self ):
>>         print "i am in a"
>>
>>class b:
>>     def __init__(self):
>>         print "I am in b"
>>
>>c = [ "a", "b" ]
>>
>>mya = c[0]()
>>
>>Not sure how to do the last command.
>>    
>>
You're missing one word/function call....

>But yes, it's possible to do this, if we use a dictionary to map between
>strings and class construction:
>...
>lookup = {'a' : a,
>          'b' : b}
>mya = lookup['a']()
>  
>
Or go one step further, and use the 'globals' dictionary Python creates 
for you:

 >>> mya = globals()[ c[0] ]()
i am in a
 >>>

Or:

 >>> instances = [ globals()[i]() for i in c ]
i am in a
I am in b
 >>>

Though that's really pushing the limits of parens & brackets for my 
taste...  ;-)

kb