proposal: concatenation of iterators

Paul Rubin phr-n2002b at
Mon Aug 12 16:59:44 CEST 2002

It would sure be useful sometimes to be able to say

  a = iter((2, 3, 4))
  b = iter((5, 6, 7))

  for x in a + b:  # concatenate two iterators
     print x,

and get:

  2 3 4 5 6 7

The implementation is obvious: a+b would just be a generator that
cycles through a and then b.  Easy enough to code up with new-style
classes, but it seems natural enough that it should be built into
normal iterators.

Any thoughts?  Is there already some simple way to do this?

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