1. *型聖誕樹

height = 15
stars = 1
for i in range(height):
    if i % 2 == 0 :
        print((' ' * (height - i)) + ('+' * stars))
    else:
        print((' ' * (height - i)) + ('*' * stars))
    stars += 2
print((' ' * height) + '|')

列印結果:

2. 升級版

import turtle

screen = turtle.Screen(
 
)
screen.setup(800,600)
circle = turtle.Turtle()
circle.shape('circle')
circle.color('red')
circle.speed('fastest')
circle.up()
square = turtle.Turtle()
square.shape('square')
square.color('green')
square.speed('fastest')
square.up()
circle.goto(0,280)
circle.stamp()
k = 0
for i in range(1, 17):
    y = 30 *
 
 i
    for j in range(i - k):
        x = 30 * j
        square.goto(x, -y + 280)
        square.stamp()
        square.goto(-x, -y + 280)
        square.stamp()
    if i % 4 == 0:
        x = 30 * ( j + 1 )
        circle.color('red')
        circle.goto(-x, -y + 280)
        circle.stamp()
        circle.
 
goto(x,-y + 280)
        circle.stamp()
        k += 2
    if i % 4 == 3:
        x = 30 * ( j + 1)
        circle.color('yellow')
        circle.goto(-x, -y + 280)
        circle.stamp()
        circle.goto(x, -y + 280)
        circle.stamp()
square.color('brown')
for i in range(17,20):
    y = 30 * i
    for j in range(3):
        x = 30 * j
        square.goto(x, -y + 280)
        square.stamp()
        square.goto(-x, -y + 280)
        square.stamp()
turtle.exitonclick()

顯示效果：

3.抽象版

from turtle import *
import random
import time

n = 80.0

speed("fastest")
screensize(bg = 'seashell')
left(90)
forward(3*n)
color("orange", "yellow")
begin_fill()
left(126)

for i in range(5):
    forward(n / 5)
    right(144)
    forward(n / 5)
    left(72)
end_fill()
right(126)

color("dark green")
backward(n * 4.8)
def tree(d, s):
    if d <= 0: return
    forward(s)
    tree(d - 1, s *.8)
    right(120)
    tree(d - 3, s *.5)
    right(120)
    tree(d - 3, s *.5)
    right(120)
    backward(s)
tree(15, n)
backward(n/2)

for i in range(200):
    a = 200 - 400 * random.random()
    b = 10 - 20 * random.random()
    up()
    forward(b)
    left(90)
    forward(a)
    down()
    if random.randint(0, 1) == 0:
            color('tomato')
    else:
        color('wheat')
    circle(2)
    up()
    backward(a)
    right(90)
    backward(b)
time.sleep(60)

顯示效果：