圣诞节！教你用 Python 画棵圣诞树

​1height = 5 2 3stars = 1 4for i in range(height): 5    print((' ' * (height - i)) + ('*' * stars)) 6    stars += 2 7print((' ' * height) + '|')

​ 1import turtle  2screen = turtle.Screen()  3screen.setup(800,600)  4circle = turtle.Turtle()  5circle.shape('circle')  6circle.color('red')  7circle.speed('fastest')  8circle.up()  9square = turtle.Turtle() 10square.shape('square') 11square.color('green') 12square.speed('fastest') 13square.up() 14circle.goto(0,280) 15circle.stamp() 16k = 0 17for i in range(1, 17): 18    y = 30i 19    for j in range(i-k): 20        x = 30j 21        square.goto(x,-y+280) 22        square.stamp() 23        square.goto(-x,-y+280) 24        square.stamp() 25    if i % 4 == 0: 26        x = 30(j+1) 27        circle.color('red') 28        circle.goto(-x,-y+280) 29        circle.stamp() 30        circle.goto(x,-y+280) 31        circle.stamp() 32        k += 2 33    if i % 4 == 3: 34        x = 30(j+1) 35        circle.color('yellow') 36        circle.goto(-x,-y+280) 37        circle.stamp() 38        circle.goto(x,-y+280) 39        circle.stamp() 40square.color('brown') 41for i in range(17,20): 42    y = 30i 43    for j in range(3): 44        x = 30j 45        square.goto(x,-y+280) 46        square.stamp() 47        square.goto(-x,-y+280) 48        square.stamp() 49turtle.exitonclick()

​ 1from turtle import *  2import random  3import time  4  5n = 80.0  6  7speed("fastest")  8screensize(bg='seashell')  9left(90) 10forward(3n) 11color("orange", "yellow") 12begin_fill() 13left(126) 14 15for i in range(5): 16    forward(n/5) 17    right(144) 18    forward(n/5) 19    left(72) 20end_fill() 21right(126) 22 23color("dark green") 24backward(n4.8) 25def tree(d, s): 26    if d <= 0: return 27    forward(s) 28    tree(d-1, s.8) 29    right(120) 30    tree(d-3, s.5) 31    right(120) 32    tree(d-3, s*.5) 33    right(120) 34    backward(s) 35tree(15, n) 36backward(n/2) 37 38for i in range(200): 39    a = 200 - 400 * random.random() 40    b = 10 - 20 * random.random() 41    up() 42    forward(b) 43    left(90) 44    forward(a) 45    down() 46    if random.randint(0, 1) == 0: 47            color('tomato') 48    else: 49        color('wheat') 50    circle(2) 51    up() 52    backward(a) 53    right(90) 54    backward(b) 55time.sleep(60)