The snippet of code below uses two functions to dynamically create
functions using lambda.
Both of these uses should produce the same result, but they don't.
The expected output of this code is
11
12
11
12
However, what we get instead is
12
12
11
12
The problem is that the two functions returned by MakeLambdaBad() are
apparently the same, but the functions returned by MakeLambdaGood()
are different.
Can anyone explain why this would/should be the case?
--
Michal Ostrowski
mostr...@gmail.com
def MakeLambdaGood():
def DoLambda(x):
return lambda q: x + q
a = []
for x in [1,2]:
a.append(DoLambda(x))
return a
def MakeLambdaBad():
a = []
for x in [1,2]:
a.append(lambda q: x + q)
return a
[a,b] = MakeLambdaBad()
print a(10)
print b(10)
[a,b] = MakeLambdaGood()
print a(10)
print b(10)
--
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