IndexError: list index out of range

[rajeev1729]

please help me. i am unable to understand IndexError.

def binarySearch (arr,first,last,element):
    mid = first+last//2
    print("Value of index ",mid)
    print("Value of element ",arr[mid])
    if last>=first:
        if(element==arr[mid]):
            print("element",element,"found at location ",mid)
        else:
            if(element>arr[mid]):
                return binarySearch(arr,mid+1,last,element)
            else:
                return binarySearch(arr,first,mid-1,element)
    else:
        print("Element is not present in array")
    
arr = [int(x) for x in input("Enter list of element:").split(',')]
element=int(input("Enter search element:"))
binarySearch(arr,0,len(arr)-1,element)

==================== RESTART: C:/python/program/binary.py ====================
Enter list of element:2,3,4,5,6
Enter search element:2
Value of index 2
Value of element 4
Value of index 0
Value of element 2
element 2 found at location 0
>>>
==================== RESTART: C:/python/program/binary.py ====================
Enter list of element:2,3,4,5,6
Enter search element:3
Value of index 2
Value of element 4
Value of index 0
Value of element 2
Value of index 1
Value of element 3
element 3 found at location 1
>>>
==================== RESTART: C:/python/program/binary.py ====================
Enter list of element:2,3,4,5,6
Enter search element:3
Value of index 2
Value of element 4
Value of index 0
Value of element 2
Value of index 1
Value of element 3
element 3 found at location 1
>>>
==================== RESTART: C:/python/program/binary.py ====================
Enter list of element:2,3,4,5,6
Enter search element:5
Value of index 2
Value of element 4
Value of index 5
Traceback (most recent call last):
File "C:/python/program/binary.py", line 18, in <module>
binarySearch(arr,0,len(arr)-1,element)
File "C:/python/program/binary.py", line 10, in binarySearch
return binarySearch(arr,mid+1,last,element)
File "C:/python/program/binary.py", line 4, in binarySearch
print("Value of element ",arr[mid])
IndexError: list index out of range
>>>
==================== RESTART: C:/python/program/binary.py ====================
Enter list of element:2,3,4,5,6
Enter search element:6
Value of index 2
Value of element 4
Value of index 5
Traceback (most recent call last):
File "C:/python/program/binary.py", line 18, in <module>
binarySearch(arr,0,len(arr)-1,element)
File "C:/python/program/binary.py", line 10, in binarySearch
return binarySearch(arr,mid+1,last,element)
File "C:/python/program/binary.py", line 4, in binarySearch
print("Value of element ",arr[mid])
IndexError: list index out of range