[Tutor] Creating an Identifier or Object Name from a String?

[Hazlett, Les]

Hi,

I read the information at http://mail.python.org/mailman/listinfo/tutor
but am still not sure how to properly send a question.  Will I get an
email response without joining the list?  

Thanks for any help.

Les

 

I thought when I read the 2002 thread with the subject (Creating an
Identifier or Object Name from a String?), that I had found a solution
to my problem.  But, I can't make the concept work for creating an
object identifier.  

THIS WORKS

        class nsf(object):
            # name = ''
            def __init__(self, id):
                self.name = id 
         
        # main
        Ireland = nsf('Ireland')

BUT - THIS DOESN'T

        class nsf(object):
            # name = ''
            def __init__(self, id):
                self.name = id 
         
        # main
        cmdstr = "Ireland = nsf('Ireland')"
        eval(cmdstr)

-------------------------

I get an error saying the following

      eval(cmdstr)
  File "(string)", line 1
      Ireland = nsf('Ireland')
              ^
SyntaxError: invalid syntax

-------------------------

For reference the thread message that I am referring to is:

Gregor Lingl wrote:

        I Tried it and it worked (?!)
        
        Python 2.2c1 (#27, Dec 14 2001, 13:15:16) [MSC 32 bit (Intel)]
on win32
        Type "copyright", "credits" or "license" for more information.
        IDLE 0.8 -- press F1 for help
        >>> class K:
                pass
        
        >>> field1 = K()
        >>> field2 = K()
        >>> field3 = K()
        >>> for ct in range(1,4):
                obj="field"+str(ct)
                objTC=eval(obj)
                objTC.text=['a','b',str(ct)]
        
        
        >>> field1.text
        ['a', 'b', '1']
        >>> field2.text
        ['a', 'b', '2']
        >>> field3.text
        ['a', 'b', '3']
        >>>
        
        Gregor
        
        

What he did also works for me. Bur, I have tried many ways to use the
same idea for creating an object identifier.  I haven't found a way yet.

 

 

 


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