Feature Proposal: Sequence .join method

[Michele Simionato]

This can be shortened to

def interlace(x, i):
        """interlace(x, i) -> i0, x, i1, x, ..., x, iN
        """
        i = iter(i)
        i.next()
        for e in i:
            yield x
            yield e

I have noticed a while ago that inside generators StopIteration is
automatically trapped, i.e.

def g():
    yield 1
    raise StopIteration
    yield "Never reached"

only yields 1. Not sure if this is documented behavior, however, of if
it is an implementation
accident. Anybody who knows?

                    Michele Simionato