triangle.py

n=int(input("base"))

def triangle(n):
    y=((n+(n-1))/2)
    x=1
    while (x <= n):
        if x%2==0:
            print(" "*(y+1)+"* "*(x-1)+"*")
            x=x+1  
            y=y-1
        elif x%2!=0:
            print(" "*y+" *"*(x-1)+" *")

            x=x+1

            y=y-1

triangle(n)