"Giovanni Bajo" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> Yes but:
>
>>>> a = []
>>>> for i in range(10):
> ... a.append(lambda: i)
> ...
>>>> print [x() for x in a]
> [9, 9, 9, 9, 9, 9, 9, 9, 9, 9]
>
> This subtle semantic of lambda is quite confusing, and still forces
> people to
> use the "i=i" trick.
The 'subtle sematic' had nothing to do with lambda but with Python
functions.
The above is exactly equivalent (except the different .funcname) to
a = []
for i in range(10):
def f(): return i
a.append(f)
del f
That should be equally confusing (or not), and equally requires the 'i=i'
trick (or not).
As is, either function definitiion is a constant and the loop makes useless
duplicates. Either form would have the same effect is hoisted out of the
loop.
Terry Jan Reedy
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