Sean Ross <seandavidross at hotmail.com>: > # (1) without parentheses: > B(y) for y in A(x) for x in myIterable Er, excuse me, but that had better *not* be equivalent to > # (2) for clarity, we'll add some optional parentheses: > B(y) for y in (A(x) for x in myIterable) because the former ought to be a single iterator expression with two nested loops (albeit an erroneous one, since x is being used before it's bound). Greg Ewing, Computer Science Dept, +--------------------------------------+ University of Canterbury, | A citizen of NewZealandCorp, a | Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. | greg at cosc.canterbury.ac.nz +--------------------------------------+
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