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if STREAM.isatty():


On 30/08/2019 12:05, Hongyi Zhao wrote:
> On Fri, 30 Aug 2019 18:42:51 +1000, Chris Angelico wrote:
> 
>> There is no magic here. It is simply asking a question, and then making
>> a decision based on the answer.
> 
> What's your mean by saying this?  Sorry for my poor English.

"No 'magic'" (?? if Google is to be trusted :-) means here that there is 
nothing complicated and strange going on in the background. 
"STREAM.isatty()" just asks a question -- is this a tty? -- and the 
answer will always be the same for the same STREAM.  Either it is a tty 
or it isn't, it will not change from one to the other.  It's exactly 
like "STRING.isnumeric()"; for the same string it will always give the 
same answer.

-- 
Rhodri James *-* Kynesim Ltd