variable hell

[Mike Meyer]

[The context is totally hosed by top posting and failure to mark
quoted text. I gave up on recovering it.]

"Adriaan Renting" <renting at astron.nl> writes:

> Not in my Python.
>
>>>> for count in range(0, 10):
> ...     value = count
> ...     exec("'a%s=%s' % (count, value)")

You left in the extra set of quotes. Try this:

>>> for count in range(10):
...  value = count
...  exec 'a%s = %s' % (count, value)
... 
>>> dir()
['__builtins__', '__doc__', '__file__', '__name__', 'a0', 'a1', 'a2', 'a3', 'a4', 'a5', 'a6', 'a7', 'a8', 'a9', 'count', 'help', 'readline', 'rlcompleter', 'sys', 'value']

I also removed the extraneous parens that you and Rafi both used -
exec is a statement, not a function.

Of course, your two examples are better done using imp and globals() or
locals(). 

          <mike

>>>> dir()
> ['__builtins__', '__doc__', '__name__', 'count', 'value']
>>>> for count in range(0, 10):
> ...     value = count
> ...     exec(eval("'a%s=%s' % (count, value)"))
> ... 
>>>> dir()
> ['__builtins__', '__doc__', '__name__', 'a0', 'a1', 'a2', 'a3', 'a4', 'a5', 'a6', 'a7', 'a8', 'a9', 'count', 'value']
>>>> 
>
> I myself use code like this to load user defined classes.
>             exec(eval("'from %s import %s' % (script, script)"))
>             exec(eval("'self.user_class = %s()' % script"))
>             self.user_class.run()
>
> But this can probably be done with the imp module too.
>  
>>>>rafi <rafi at free.fr> 08/25/05 6:03 pm >>> 
> Adriaan Renting wrote: 
>>You might be able to do something along the lines of 
>> 
>>for count in range(0,maxcount): 
>>  value = values[count] 
>>  exec(eval("'a%s=%s' % (count, value)")) 
>  
> why using the eval? 
>  
> exec ('a%s=%s' % (count, value)) 
>  
> should be fine 
>  
> -- 
> rafi 
>  
> "Imagination is more important than knowledge." 
>                            (Albert Einstein) 
> -- 
> http://mail.python.org/mailman/listinfo/python-list 
>

-- 
Mike Meyer <mwm at mired.org>			http://www.mired.org/home/mwm/
Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.