如何用Python画一个圣诞树呢？
最简单：
height = 5
stars = 1
for i in range(height):
print((' ' * (height - i)) + ('*' * stars))
stars += 2
print((' ' * height) + '|')效果：
哈哈哈哈，总有一种骗了大家的感觉。
其实本文是想介绍Turtle库来画圣诞树。
import turtle
screen = turtle.Screen()
screen.setup(375, 700)
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, 13):
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 += 3
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(13, 17):
y = 30 * i
for j in range(2):
x = 30 * j
square.goto(x, -y + 280)
square.stamp()
square.goto(-x, -y + 280)
square.stamp()效果：
方法二：
import turtle
# 定义圣诞树的绿叶函数
def tree(d, s):
if d <= 0:
return
turtle.forward(s)
tree(d - 1, s * .8)
turtle.right(120)
tree(d - 3, s * .5)
turtle.right(120)
tree(d - 3, s * .5)
turtle.right(120)
turtle.backward(s)
n = 100
""" 设置绘图速度
'fastest' : 0
'fast' : 10
'normal' : 6
'slow' : 3
'slowest' : 1
"""
turtle.speed('fastest') # 设置速度
turtle.left(90)
turtle.forward(3 * n)
turtle.color("orange", "yellow")
turtle.left(126)
# turtle.begin_fill()
for i in range(5):
turtle.forward(n / 5)
turtle.right(144)
turtle.forward(n / 5)
turtle.left(72)
turtle.end_fill()
turtle.right(126)
turtle.color("dark green")
turtle.backward(n * 4.8)
# 执行函数
tree(15, n)
turtle.backward(n / 5)效果：
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