Re: [sage-devel] Python3 and super()

[Eric Gourgoulhon]

Thanks Jeroen for your answer. 
Accordingly, I am keeping the Python-2 way. 

Best regards,

Eric.

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[sage-devel] Re: Pattern matching in Sage

[Eric Gourgoulhon]

Le dimanche 12 novembre 2017 16:04:38 UTC+1, Eric Gourgoulhon a écrit :
>
>
> Yes for sure, I will rewrite it using the expression tree walker, but in 
> another ticket. 
>

This is now  #24232 . This ticket 
rebases all simplifications in calculus on manifolds on direct 
manipulations of the expression tree, by subclassing ExpressionTreeWalker 
.
 


Eric.

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[sage-devel] Re: Pattern matching in Sage

[rjf]

It includes this probably bad idea ---
"Often, tree-walkers would prefer to see divisions instead of 
multiplications and negative exponents"

which means that a programmer may have to write the same code twice.
Example:  Once for exp(-x) and once for 1/exp(x).  or   for 2^(-x),   or  
even 2^n for 
possibly negative n.
RJF


On Friday, November 17, 2017 at 3:24:20 AM UTC-8, Eric Gourgoulhon wrote:
>
> Le dimanche 12 novembre 2017 16:04:38 UTC+1, Eric Gourgoulhon a écrit :
>>
>>
>> Yes for sure, I will rewrite it using the expression tree walker, but in 
>> another ticket. 
>>
>
> This is now  #24232 . This ticket 
> rebases all simplifications in calculus on manifolds on direct 
> manipulations of the expression tree, by subclassing ExpressionTreeWalker 
> .
>  
>
>
> Eric.
>

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