In general, I recommend adding the line "import pdb;pdb.set_trace()"
to the top of your function and walking through it to see why it doesn't
work.
def foo(x):
import pdb;pdb.set_trace()
list = []
if isinstance(x, list):
for i in x:
elem = i
return list + foo(i)
else:
return 1
See https://docs.python.org/2/library/pdb.html on how pdb works.
There are faster ways to debug, but when starting out, pdb lets you see
what is happening as you run the function.
Some questions I have about this function:
- What is the purpose of the "elem" function? It is never accessed.
- What is the purpose of returning 1 if the argument is not a list?
- Why is it named "foo" rather than something that tells me what the
purpose of the function is?
On Tue, Jun 10, 2014 at 8:16 AM, hito koto <hitokoto2...@gmail.com> wrote:
> Hello,
>
> I don't know how can i do to change to write python function
> I want to following code change to write python function or change to
> write recursive definition
> >>> y = [10, 12, [13, [14, 9], 16], 7]
> >>> z = copy.deepcopy(y)
> >>> y
> [10, 12, [13, [14, 9], 16], 7]
> >>> z
> [10, 12, [13, [14, 9], 16], 7]
> >>> z[2][1][1]
> 9
> >>> z[2][1][1] = 88
> >>> z
> [10, 12, [13, [14, 88], 16], 7]
> [10, 12, [13, [14, 9], 16], 7]
> >>>
>
> this is my use function but not work:
>
> def foo(x):
> list = []
> if isinstance(x, list):
> for i in x:
> elem = i
> return list + foo(i)
> else:
> return 1
>
>
>
>
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