Patterns in Python

 

num=int(input("Enter number of rows "))

for i in range (1,num+1):

    print()

    for s in range (0,num-i):

        print(" ",end="")

        

    for j in range (1,(2*i)):

        if j==1 or j==2*i-1 or i==num:

            print("*",end="")

        else:

            print(" ",end="")