On Aug 6, 1:26 pm, Steve Holden <[EMAIL PROTECTED]> wrote:
> Lee Fleming wrote:
> > On Aug 6, 6:25 am, Neil Cerutti <[EMAIL PROTECTED]> wrote:
> > Because when the function is called, the line
>
> >> if y is None: y = []
>
> > is exe
Thanks for all the help, everyone. I guess I was confused with default
arguments that were mutable and immutable. I will continue to look
over these posts until I understand what is happening.
I cannot believe the number of helpful responses I got!
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On Aug 6, 12:30 pm, "Hamilton, William " <[EMAIL PROTECTED]> wrote:
> When you call f(23), the variable y within it gets created and points at
> None. When f(23) exits, the y that it created gets destroyed. (Well,
> goes out of scope, but even if it's not garbage collected it won't ever
> come ba
On Aug 6, 6:25 am, Neil Cerutti <[EMAIL PROTECTED]> wrote:
Because when the function is called, the line
> if y is None: y = []
is executed, binding a brand new empty list to y. This
"rebinding" happens every time the function is called, unless you
provide an argument for y that is not Non
Hello,
I have a simple question. Say you have the following function:
def f(x, y = []):
y.append(x)
return y
print f(23) # prints [23]
print f(42) # prints [23, 42]
As far as I understand, the default value y, an empty list, is created
when the def statement evaluates. With this though
