Update the-filter-built-in-function.md

[Stefan-Stojanovic]

I have updated this question because when testing the code, the output was:

<filter object at 0x0000012E54DF0EE0>

Instead of:
[-3,-2,-1]

I modified the example a little bit by saving the filtered result in a new variable and then printing the filtered result using a for loop.

[enki-hq]

Insight previews:

• enkidevs/curriculum/python/functional-programming/arrays-ii/the-filter-built-in-function.md

[mukeshgurpude]

Could have just converted the filter object to list,

filtered = filter(mystery_function, numbers)
print(list(filtered))

I think, this approach is straightforward instead of the for loop..

[mukeshgurpude]

In line 38 of it's mentioned as follows

filter always returns a list, unless the iterable object passed in is a string or a tuple

For me on python3.9, filter is returning the filter object, so, I think this line should be rewritten.

[mukeshgurpude]

Looks good to me.