asterisk Christmas tree

tree.py

# 9-24-2018 by Chiara Hsieh
# Draw a Christmas tree with this code snippet
import sys

def tree_chunk(width, bottom, top):
    
    for i in range(bottom, top, 2):
        spaces=(width-i)/2
        for j in range(spaces):
            sys.stdout.write (' ')
        for j in range(i):
            sys.stdout.write ('*')
        for j in range(spaces):
            sys.stdout.write(' ')
        sys.stdout.write('\n')    

total_width=21
tree_chunk(total_width,1,9)
tree_chunk(total_width,5,13)
tree_chunk(total_width,9,19)
tree_chunk(total_width,3,5)
tree_chunk(total_width,3,5)
tree_chunk(total_width,3,5)