Python Coding Challange - Question With Answer(01200325)

 

Step-by-Step Breakdown:

1. Importing the array module

   
   import array as arr

   • The array module is a built-in Python module that provides an efficient way to store numerical values of the same type.
   • It allows for type-restricted arrays, meaning all elements must be of the same type.

2. Creating an Array

   
   numbers = arr.array('I', [-1, 6, 9])

   • Here, arr.array('I', [...]) creates an array of unsigned integers ('I' stands for unsigned int, typically 4 bytes in size).
   • Unsigned integers ('I') only store non-negative values (0 and above).
   • The list [-1, 6, 9] is passed as the initial values.

3. Error in the Code:

   • Since -1 is a negative number, it cannot be stored in an unsigned integer array ('I').
   • Python raises an OverflowError because -1 is outside the valid range for an unsigned integer.

Expected Output:

When you run the code, Python will throw an error like:

OverflowError: can't convert negative value to unsigned int

Fixing the Code:

If you want to store negative values, you should use a signed integer type, like 'i' instead of 'I':

numbers = arr.array('i', [-1, 6, 9])
print(numbers[0]) # Output: -1

Alternatively, if you only want non-negative values, remove -1:

numbers = arr.array('I', [6, 9])
print(numbers[0]) # Output: 6