python - can't find the right answer for "The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all()."

Question

I've googled it but couldn't find the right solution for my case. I made a function1 before the code below to get a result in a form of list. So basically, a[i] and a[i+1] are the list of numbers and strings. When I used for loop as below, it works just fine until it reaches 100. After that, it keeps showing the "The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all()." I've changed the list to other forms to fix the problem, but it wouldn't work. I would really appreciate it if anyone could help me with it.

range_end=200
a=dict()
for i in range(0,range_end):
    if i == range_end:
        break
    else:
        a[i]=funcion1()   
        a[i+1]=function1()
        
        if a[i][3]==a[i+1][3]:  
            answer=a[i]
        elif a[i][3] < a[i+1][3]:
            answer=a[i]
        else:
            answer=a[i+1]

question from:https://stackoverflow.com/questions/65894257/cant-find-the-right-answer-for-the-truth-value-of-a-series-is-ambiguous-use-a

Answer 1

Waitting for answers