buffering. In the first case, there is either no buffering, or line buffering on sys.stdout, so you see the lines in order.
In the second case, there is a buffer of a few hundred or thousand bytes for stdout in the python process, and you see the two lines of python output together (in this case, when the python process exits and flushes all its buffers). You can use the "flush" method on file objects to "clear out" these buffers. Jeff
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