Tuples Debugging

• Each of the following short code contains one or more bugs.     

• Please identify and correct these bugs.

• Provide an explanation for your answer.

Question-1

x = (1,2,3,4,5,6,7,8,9]

Solution

The right square bracket ] must be a paranthesis ) so x can be a tuple.

Question-2

x, y = 'NY', 'NJ'
x*y

Solution

The * operator cannot be used for two strings; it can only be used with either two numbers, one string and one integer or one tuple and one integer.

Question-3

x = ('A', 'B', 'C', 'D', 'E')
x[2] = '-'

Solution

x is a tuple, and tuples are immutable, so elements cannot be changed. x[2], which is ‘C’, cannot be changed as ‘-‘.

Question-4

x = ('A', 'B', 'C', 'D', 'E')
x[-6]

Solution

There is no element with index -6 because the negative indexes are: -1 for ‘E’, -2 for ‘D’, -3 for ‘C’, -4 for ‘B’, -5 for ‘A’.

Question-5

sequence = (1,2,3,4,5)
sequence.append(6)

Solution

sequence is a tuple, so it is immutable. It cannot be modified, and new elements cannot be added to it. Therefore, tuples do not have an append() method.

Question-6

sequence = (1,2,3,4,5)

for i in range(5):
  print(sequence[i+1])

Solution

If i=4, sequence[4+1] refers to the element of the tuple at index 5, but the largest index is 4 (index of element 5). Therefore, sequence[5] does not exist.

Question-7

sequence = ('a','b','c')

print(sequence.index('A'))

Solution

The index() method raises an error since ‘A’ is not an element of the sequence tuple.