On Wed, 06 Sep 2017 01:31:56 +0000, Stefan Ram wrote:
> Steve D'Aprano <steve+pyt...@pearwood.info> writes:
>>On Wed, 6 Sep 2017 12:19 am, Rustom Mody wrote:
>>>And how do you write even the simplest assignment statement without a
>>>(mathematical) expression on the rhs?
>>name = other_name is not a mathematical expression. Its giving something
>>a new name.
>
> In mathematics, every author is free to give his own definitions to
> concepts and create his own notation.
[...]
> Of course, definitions of the form
>
> x := 2 y := x
Indeed they do. Perhaps I should have said that the Python assignment
name = other_name
is not *necessarily* a mathematical expression, but can also be used to
give an object a new name.
We can argue whether mathematics has assignment at all, or merely has
definitions. That's a level of hair-splitting where I'm happy to sit on
the fence and not give an opinion as to whether the mathematical
definition:
y = 2
is or is not the same as the Python assignment:
y = 2
--
Steven D'Aprano
“You are deluded if you think software engineers who can't write
operating systems or applications without security holes, can write
virtualization layers without security holes.” —Theo de Raadt
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