Currently the common pattern for yielding the elements in a sequence is as follows:
for x in sequence: yield x I propose the following replacement (the result would be identical): yield *sequence The semantics are somewhat different from argument expansion (from which the syntax is borrowed), but intuitive: yield all of the elements of a sequence (as opposed to yield the sequence as a single item). This doesn't appear to have any syntactical collisions, as it is currently a syntax error. Motivation: More compact notation, and the compiler can produce more efficient bytecode than the former representation (the loop overhead is omitted). This pattern is very common in recursive generators, so a compact notation would be nice. Also, there is precedent: the proposed notation is implemented in javascript with identical semantics (though in javascript, the conventional spacing is different: yield* sequence ). Examples: yield *(1,2,3) ... instead of : yield 1; yield 2; yield 3 ... or: for x in (1,2,3): yield x yield *chain(seq1, seq2) ... instead of : for x in chain(seq1, seq2) yield x ~ Ken Seehart -- https://mail.python.org/mailman/listinfo/python-list
