what does := means simply?

[Chris Angelico]

On Sat, May 19, 2018 at 3:27 AM, bartc <bc at freeuk.com> wrote:
> On 18/05/2018 15:47, Chris Angelico wrote:
>>
>> On Sat, May 19, 2018 at 12:37 AM, bartc <bc at freeuk.com> wrote:
>>>
>>> Have a look at some of the implementations here (to test some Mandelbrot
>>> benchmark):
>>>
>>>
>>> https://benchmarksgame-team.pages.debian.net/benchmarksgame/performance/mandelbrot.html
>>>
>>> The three Python examples all use 'import sys' and 'import
>>> multiprocessing',
>>> none of which I can find any trace of as any sort of files let alone .py.
>>> One of them also uses 'import array', which I can't find either.
>>
>>
>> I guess you didn't look very hard.
>>
>>>>> import multiprocessing
>>>>> multiprocessing.__file__
>>
>> '/usr/local/lib/python3.8/multiprocessing/__init__.py'
>
>
> But you have to load it first to find out. (And if you follow nested
> imports, you will eventually get to those that don't have a .py file.)

... so?

> However, if I load sys, multiprocessing and array, then print sys.modules, I
> get a very long list of modules, at which point anyone thinking of emulating
> the behaviour of those modules would promptly give up.

Once again, you're confusing *porting* with *emulating*. If you don't
understand the difference between those two concepts, I recommend
spending some time with Wikipedia.

ChrisA