On Tue, Nov 25, 2008 at 9:46 PM, Scott <[EMAIL PROTECTED]> wrote:
> On Nov 25, 12:27 pm, "Ondrej Certik" <[EMAIL PROTECTED]> wrote:
>> Hi Scott,
>>
>> On Tue, Nov 25, 2008 at 4:25 PM, Scott <[EMAIL PROTECTED]> wrote:
>>
>> > How do you bend subs syntax to substitute and and array of symbols?
>>
>> > a,b,x,y=symbols('a','b','x','y')
>> > q=a,b
>> > p=x,y
>> > f= a**2 + b
>>
>> > ?? f.subs({p:q})??
>>
>> > x**2+y
>>
>> Are you talking about the current syntax, or the new syntax?
>
> Either syntax , I currently use version 0.6.2 but will upgrade to
> 0.6.3 as soon as I find .deb file. My goal is to swap easy to type
> sympols with symbol that pprint well.
Well, this works for me:
In [1]: var("a b x y")
Out[1]: (a, b, x, y)
In [2]: f = a**2 + b
In [3]: f.subs({a: x, b: y})
Out[3]:
2
y + x
So if you want to use the syntax .subs({x, y: a, b}), then you can
easily implement that, but I don't think it should be the default, at
least I don't find it intuitive.
Ondrej
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