For those who would be interested in my decision:

def print_rangoli(size): max_letter_num = size + 96 dash = '-' new_list = [] for row in range(size): a = [chr(max_letter_num - num) for num in range(size - row)] new_list.append(a)

for el in new_list[::-1]:
    content = dash.join(a for a in el)
    print(content.rjust((size * 2) - 1, dash) + content.rjust((size * 2) - 1, dash)[::-1][1:])
for el1 in new_list[1:]:
    content = dash.join(a for a in el1)
    print(content.rjust((size * 2) - 1, dash) + content.rjust((size * 2) - 1, dash)[::-1][1:])
return None

I really enjoyed how it challenges you to think about symmetry and spacing while working with characters from the alphabet. 11xplay ID

This here seems to be much easier with simple mirroring technique

def print_rangoli(size): alpha = "abcdefghijklmnopqrstuvwxyz" width = size *4 -3 for i in range(size-1, -1, -1): left = alpha[size-1: i : -1] mid = alpha[i] right = alpha[i+1 :size ]

    final = '-'.join(left + mid + right)
    final1 = final.center(width, '-')
    print(final1)

for i in range(1,size):
    mid = alpha[i]
    left = alpha[size-1: i : -1]
    right = alpha[i+1 :size ]

    final = '-'.join(left + mid + right)
    final1 = final.center(width, '-')
    print(final1)

if name == 'main': n = int(input()) print_rangoli(n)

if you guies want a math, no list and pure logical then can reffer to this:

def print_rangoli(size):
    # your code goes here
    p = 96 + size
    a = ( size - 1 ) * 2 + 1
    w = ( size - 1 ) * 4 + 1
    
    for i in range(a):
        ptrn = ""
        
        if i < size:
            itr = i
            v = p - i
        else:
            itr = a - i - 1
            v = p + i + 1 - a
        
        for j in range(itr):
            ptrn += chr(v-j+itr) + "-"
        
        ptrn += chr(v) + ptrn[::-1]
        print(ptrn.center(w,"-"))

if __name__ == '__main__':
    n = int(input())
    print_rangoli(n)

Am I dumb?

alph = list('abcdefghijklmnopqrstuvwxyz')
    w = ((size*2) - 1)*2 - 1
    
    print(alph[size-1].center(w, '-'))
    for i in range(1, size):
        print(("-".join(alph[size-1 : size-1-i : -1]) + '-' + "-".join(alph[size-1-i : size])).center(w, '-'))
        
    for i in range(size-2, 0, -1):
        print(("-".join(alph[size-1 : size-1-i : -1]) + '-' + "-".join(alph[size-1-i : size])).center(w, '-'))
    if size > 1:
        print(alph[size-1].center(w, '-'))