why list() cannot be extended?

[cp4]

you can use list like this:

    numbers = [1, 7, 2, 34, 8, 7, 2, 5, 14, 22, 93, 48, 76, 15, 7]
    mylist =  list(numbers)
    mylist.extend([42, 24])
    print mylist

You got:

     [1, 7, 2, 34, 8, 7, 2, 5, 14, 22, 93, 48, 76, 15, 7, 42, 24]

so far so good.
But if you do this:

    numbers = [1, 7, 2, 34, 8, 7, 2, 5, 14, 22, 93, 48, 76, 15, 7]
    mylist =  list(numbers).extend([42, 24])
    print mylist

You got a

  None

why it would be that?

[yzha3917]

it seems

list(numbers).extend([42,24])

is not a correct syntax. See here

[cp4]

I don't get it.
What's wrong indeed?
@yzha3917

[yzha3917]

list().extend() is not legitimate structure, so it returns in none.

YaDong ZHANG

On 1 Apr 2015, at 03:23, Max Wang notifications@github.com wrote:

I don't get it.
What's wrong indeed?
@yzha3917

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