Brian Quinlan wrote:
Sorry, I wasn't as precise as I should have been.
If you consider this example:
(<expr> for x in y)
I thought that every time that <expr> was evaluated, it would be done in
a new closure with x bound to the value of x at the time that the
closure was created.
Instead, a new closure is created for the entire generator expression
and x is updated inside that closure.
Thanks you for explaining your confusion. Knowing what sort of
other-language-baggage people are being mislead by can only help in
explaining Python. But here is my question. In Python,
g = (<expr> for x in iterable)
is essentially an abbreviation for, and means the same as
def _(it):
for x in it:
yield <expr>
g = _(iterable)
del _
Are there language in which a similar construct has an essentially
different meaning?
Terry Jan Reedy
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