manipulate string

[Werner Schiendl]

Hi,

Werner Schiendl wrote:

> 
> the following works:
> 
>  >>> a = '0123456789'
>  >>>
>  >>> b = " ".join( [i % 2 and "-" or a[i] for i in range(len(a))] )
>  >>> b
> '0 - 2 - 4 - 6 - 8 -'
> 
> 

if you prefer to use generators, you could use:

 >>> a = '0123456789'
 >>>
 >>> def hide_every_2nd(x):
... 	while True:
... 		yield x.next()
... 		x.next()
... 		yield "-"
... 		
 >>> b = " ".join(hide_every_2nd(iter(a)))
 >>> b
'0 - 2 - 4 - 6 - 8 -'


hth

Werner