Simple Recursive Generator Question

[Samuel Bronson]

MetalOne wrote:
 > This is what I have, but it does not work.
 > Changing yield to print, shows that the recursion works correctly.
 >
 > def bitIndexGenerator(mask, index=0):
 >     if mask == 0: return
 >     elif mask & 0x1: yield index
 >     bitIndexGenerator(mask >> 1, index+1)
 >
 > What am I missing?

Everything needs to be yielded from the outermost generator, like

def bitIndexGenerator(mask, index=0):
     if mask == 0: return
     elif mask & 0x1: yield index
     for i in bitIndexGenerator(mask >> 1, index+1):
         yield i

However, this is ugly ;-), and kind of defeats the purpose of
generators. Why do you want to use recursion like this?