Solution
def numinput():
n=int(input("Number of lines 'only odd number' :: "))
if (n%2!=0 and n>2):
diode(n)
else:
print(":: Only odd numbers and not 1 ::")
numinput()
print()
def diode(n):
print()
for i in range(1, n+3):
for j in range(1, 5*(n+2)//2):
if i<=n//2+2 and j<=i or i>1 and i < n+2 and j>=3*(n//2+2) or i>n//2+2 and j<=2*(n//2+2)-i:
print("@",end="")
elif i==n//2+2 and j>i and j < i*3:
print("*",end="")
else:
print(" ",end="")
print()
print()
numinput()
print()
print("It's a symbol like a diode.")
print()
numinput()
See Code Repository