New submission from Poul-Henning Kamp:
I'd like to nominate this piece of code as candidate for the next round of
"Most unexpected python behaviour" awards:
def foo(a, x = []):
x.append(a)
return x
print(foo(1))
print(foo(2))
I expected the output to be:
[1]
[2]
but I get:
[1]
[1, 2]
Bug? (If not, I'd *love* to read the rationale for this behaviour...)
----------
messages: 190557
nosy: bsdphk
priority: normal
severity: normal
status: open
title: Strange behaviour with default list argument
type: behavior
versions: Python 2.7, Python 3.2
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Python tracker <[email protected]>
<http://bugs.python.org/issue18127>
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