[Tutor] Error: 'IndexedVar' object is not callable

[Pooja Bhalode]

Hi Steven,

Thank you so much for your help. It worked. That was the mistake I had. I
had (i,j) instead of  [i,j]

Thanks again

Pooja

On Sat, Sep 10, 2016 at 12:23 PM, Pooja Bhalode <poojabhalode11 at gmail.com>
wrote:

> Hi everyone,
>
> I am sorry about the confusion earlier,
> I am trying to run Pyomo environment in Python on sublime text editor.
> Python version of 2.7.11. I am running the code in sublime itself.
>
> The code is somewhat long, around 200 lines.
> I can add snippets of it though.
>
> Code:
>
> m.z = ContinuousSet(bounds = (0,10))
> m.t = ContinuousSet(bounds = (0,10))
> where all the variables that I am defining, are varying along the z and t
> direction.
>
> Variables:
> m.C = Var(m.z,m.t)
> m.Cair = Var(m.z,m.t)
> m.masswater = Var(m.z,m.t)
> m.massair = Param(initialize = 1833.50)
>
> that is C and Cair and all other variables are varying along z and t
> direction.
>
> After this, when I define the equations,
>
> def _calculations(m,i,j):
> if i == 0 or i == 1 or j == 0:
> return Constraint.Skip
>
> return m.wateraccumulated(j) == 916.50 - (m.C(i,j)*46*28/(28*18*1.205 +
> m.C(i,j) * 46*28))*2750
>
> if i == 0:
> return m.vel(i,j) == m.inmassflowrate/ ((m.outerdiameter * m.outerdiameter
> * m.pi/4)*m.densityfeed)
> if i == 1:
> return m.vel(i,j) == m.outmassflowrate/((m.outerdiameter *
> m.outerdiameter * m.pi/4)*m.densityfeed)
>
> return m.vel(i,j) == m.flowrate/((m.outerdiameter * m.outerdiameter *
> m.pi/4)*m.densityfeed)
> m.calculations = Constraint(m.z,m.t, rule = _calculations)
>
> It tells me that TypeError: 'IndexedVar' object is not callable for m.C
> itself. I think the syntax is correct but I am not able to figure out why
> the variable is not callable.
>
> I am aware that the language is slightly different than Python here, I am
> just stuck and would appreciate any help here.
>
> On Fri, Sep 9, 2016 at 9:49 PM, Alex Kleider <akleider at sonic.net> wrote:
>
>> On 2016-09-09 18:13, Steven D'Aprano wrote:
>>
>>> Please read this article first for
>>> how you can improve the chances of getting good answers to your
>>> questions:
>>>
>>> http://sscce.org/
>>>
>>
>> In addition to the link Seven provides above, I've also found the
>> following to be worth perusing:
>> http://www.catb.org/esr/faqs/smart-questions.html
>>
>> _______________________________________________
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>
>