How to translate GAMS $ operator to pyomo?

[ye wang]

Hello,

I am new to pyomo and I have a question regarding sets.

I have some sets in gams:

Set 

        i 'hot streams' / 1*2 /

        j 'cold streams' / 1*2 /; 

 Set 

       k 'temperature locations nok + 1' / 1*3 / 

       st(k) 'stages'; 

Singleton Set 

      firstK(k) 'first temperature location' 

      lastK(k) 'last temperature location'; 

st(k) = yes$(ord(k) < card(k));

firstK(k) = yes$(ord(k) = 1); 

lastK(k) = yes$(ord(k) = card(k));

How to translate ‘st(k)’, 'firstK(k)', 'lastK(k)' in pyomo?

Another question

How to translate equation with $ in gams to pyomo? Like this:

eh(i,k)$st(k).. fh(i)*(th(i,k) - th(i,k+1)) =e= sum(j, q(i,j,k)); 

ec(j,k)$st(k).. fc(j)*(tc(j,k) - tc(j,k+1)) =e= sum(i,q(i,j,k));

THX