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From: Ron Adam <ron3200@gmail.com>
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Date: Sun, 05 Jul 2015 22:50:56 -0400
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On 07/05/2015 04:29 PM, Stefan Ram wrote:

>    But why do we not have a common and well-known term for
>    the counterpart, that something does not modify the state
>    of the world, but that the state of the world does
>    influence the value (behaviour) of a call such as
>    »datetime.datetime.now().time()«?
>
>    And this is the intention of my post: Maybe there is such
>    a term, and I just missed to learn it so far? So,
>    do you know a term for the phenomenon that can be found
>    in Python but not in mathematics and consists in the state
>    of the world influencing the value of an expressions?

Variables that are changed from an outside environment are "Volatile".

https://en.wikipedia.org/wiki/Volatile_%28computer_programming%29

It isn't used in python, though I think maybe it should be.

Cheers,
    Ron