TypeError: 'int' object is unsubscriptable

Question

I am running into this problem - TypeError: 'int' object is unsubscriptable

This happens at the line: (more code below) sectorcalc[i][2]= ((today[2]/yesterday[2])-1)

But the object today[2] is , any ideas?

Also, I couldn't find a good definition of unsubscriptable for python anywhere? what does this actually mean the problem is?

Thanks in advance:

for quote in sector[singlestock]:
        i+=1
        if i < len(sector):
            if i==0:
                sectorcalc[i][0]= quote[0]
                sectorcalc[i][2]= 0
                sectorcalc[i][3]= 0
                sectorcalc[i][4]= 0
                sectorcalc[i][5]= 0
                sectorcalc[i][6]= 0
                sectorcalc[i][7]= 0
            else:                    
                yesterday = sector[singlestock-1][i]

                print yesterday                                

                today = quote

                print type(today[2])
                sectorcalc[i][2]= ((today[2]/yesterday[2])-1)
                sectorcalc[i][3]= (today[3]/yesterday[3])-1
                sectorcalc[i][4]= (today[4]/yesterday[4])-1
                sectorcalc[i][5]= (today[5]/yesterday[5])-1 
                sectorcalc[i][6]= (today[6]/yesterday[6])-1
                sectorcalc[i][7]= (today[7]/yesterday[7])-1

Answer 1

The "[2]" in today[2] is called subscript.

This usage is possible only if "today" is a sequence type. Native sequence types - List, string, tuple etc

Since you are getting an error - 'int' object is unsubscriptable. It means that "today" is not a sequence but an int type object.

You will need to find / debug why "today" or "yesterday" is an int type object when you are expecting a sequence.

[Edit: to make it clear]

Error can be in

1. sectorcalc[i]
2. today (Already proved is a list)
3. yesterday

Answer 2

This is confusing to read:

today = quote 

Is today = datetime.date.today()? Why would a date suddenly refer to a quote? Should the variable name be quoteForToday or something more expressive? Same for yesterday. Dividing two dates as you do makes no sense to me.

Since this is a quote, would today and yesterday refer to prices or rates on different days? Names matter - choose them carefully. You might be the one who has to maintain this six months from now, and you won't remember what they mean, either.

Not that the code you wrote is valid, but I can't see why you wouldn't use a loop.

for j in range(2,7):
    sectorcalc[i][j] = (today[j]/yesteday[j])-1

instead of

        sectorcalc[i][2]= ((today[2]/yesterday[2])-1)
        sectorcalc[i][3]= (today[3]/yesterday[3])-1
        sectorcalc[i][4]= (today[4]/yesterday[4])-1
        sectorcalc[i][5]= (today[5]/yesterday[5])-1 
        sectorcalc[i][6]= (today[6]/yesterday[6])-1
        sectorcalc[i][7]= (today[7]/yesterday[7])-1