Creating a diamond pattern using loops

Question

I am trying to write a program that reads an integer and displays, using asterisks, a filled diamond of the given side length. For Example, if the side length is 4, the prog

Answer 1

    def build(width):
        if width%2==0: 
            x=[(' *'*i).center(width*2,' ') for i in range(1,(width*2/2))]
        else: 
           x=[(' *'*i).center(width*2+1,' ') for i in range(1,((width*2+1)/2))]
        for i in x[:-1]+x[::-1]: print i

This worked for me for any positive width, But there are spaces padding the *s