Interviewer asked general question about Python: difference between Tuple and List, what is an Iterator etc. pretty general questions.

Coding exercise consisted of two parts, first part I had to write a function that returns True or False if a given number is prime number.
Second question was to print in snake pattern numbers, given random n number, you had to print numbers in range of 0 to n^2, each row printed opposite order.

0 1 2
5 4 3
6 7 8

Question

Interviewer asked general question about Python: difference between Tuple and List, what is an Iterator etc. pretty general questions.

Coding exercise consisted of two parts, first part I had to write a function that returns True or False if a given number is prime number. 
Second question was to print in snake pattern numbers, given random n number, you had to print numbers in range of 0 to n^2, each row printed opposite order.

0 1 2
5 4 3
6 7 8

Anonymous · Accepted Answer

def print_snake(self, n):
        three_numbers = []
        flip = False
        for num in range(n**2 + 1):
            three_numbers.append(num)
            if (num + 1) % 3 == 0:
                if flip:
                    flip = False
                    three_numbers.reverse()
                else:
                    flip = True
                print(f"{str(three_numbers).replace('[', '').replace(']', '')}")
                three_numbers = []
        if three_numbers:
            if flip:
                three_numbers.reverse()
            print(f"{str(three_numbers).replace('[', '').replace(']', '')}")

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