Christmas Tree

2021-12-13.py

question = """
Given a file named merry-christmas.txt that has a single integer x in it, 
write a script to generate a Christmas tree with asterisks (*) and output 
it as happy-holidays.txt. The tree should have a height of x, and if 
merry-christmas.txt is empty, the height should be 25 asterisks tall.

Example (you can be flexible with your output, but this might be helpful 
for you as a starting point):

// merry-christmas.txt
3

// happy-holidays.txt
  *
 ***
*****
"""

def create_christmas_tree(height):
    for level in range(0, height + 1):
        blanks = ' ' * (height - level)
        stars  = '*' * level
        print(blanks + stars + stars[1::])
    return None

try:
    with open('merry-christmas.txt') as f:
        lines = f.readlines()
    height = int(lines[0])
except:
    height = 25

create_christmas_tree(height)