'NotImplementedType' object is not iterable

[Xu Siyuan]

How to manipulate expression?

I know here it is totally unnecessary, but I am trying to use this method to a matrix opt problem. 

Here is the code

x = cp.Variable(3)

# Create two constraints.

constraints = [x[0]<=1, x[1]<=1, x[2]<=3] 

term1 = cp.Expression()

for i in range(3):

    term1 += cp.log(x[i])

# Form objective.

obj = cp.Maximize(term1)

It does allow me to generate a term1.

Again, here it is unnecessary, because cp.sum is available. But I am applying this to a higher dimension, or for different i, I have different multipliers or stuff. What should I define term1 as? 

[Steven Diamond]

You should have "term1 = 0".