On 5/6/2010 12:34 PM Artur Siekielski said...
Hello.
I found this strange behaviour of lambdas, closures and list
comprehensions:
funs = [lambda: x for x in range(5)]
funs is now a list of lambda functions that return 'x' (whatever it
currently is from whereever it's accessible when invoked)
>>> [f() for f,x in zip(funs,range(5))]
[0, 1, 2, 3, 4]
>>> del x
>>> [f() for f in funs]
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "<stdin>", line 1, in <lambda>
NameError: global name 'x' is not defined
>>>
Emile
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