Python绘制彩色蟒蛇

本文介绍如何使用Python绘制彩色蟒蛇的方法。

一、绘制基础图形

在绘制蟒蛇之前，我们需要先绘制蟒蛇的基础图形，也就是圆和长方形。

<pre><code>
import turtle

# 绘制圆形
def draw_circle(color, radius, x, y):
    turtle.penup()
    turtle.goto(x,y)
    turtle.pendown()
    turtle.fillcolor(color)
    turtle.begin_fill()
    turtle.circle(radius)
    turtle.end_fill()

# 绘制长方形
def draw_rectangle(color, width, height, x, y):
    turtle.penup()
    turtle.goto(x,y)
    turtle.pendown()
    turtle.fillcolor(color)
    turtle.begin_fill()
    for i in range(2):
        turtle.forward(width)
        turtle.left(90)
        turtle.forward(height)
        turtle.left(90)
    turtle.end_fill()

# 画布大小
turtle.setup(800,600)

# 蛇身颜色
colors = ["red","orange","yellow","green","blue","purple"]

# 六个圆，半径递减
for i in range(6):
    draw_circle(colors[i],30-5*i,-40*i,0)

# 画蛇头
draw_circle("white",30,-170,0)
draw_circle("black",20,-170,10)
draw_circle("black",20,-170,-10)

# 画眼睛
draw_circle("red",10,-160,20)
draw_circle("red",10,-160,-20)
draw_circle("white",5,-160,20)
draw_circle("white",5,-160,-20)

二、让蟒蛇动起来

通过调用turtle库的方法，可以让蟒蛇动起来。如下面的代码：

<pre><code>
# 蛇头处理函数
def draw_snake():
    # 初始化画笔
    turtle.penup()
    turtle.goto(-200,0)
    turtle.pendown()

    # 设置速度和线条宽度
    turtle.speed(30)
    turtle.pensize(10)

    # 蛇的身体
    for i in range(30):
        turtle.circle(5*i)

    # 蛇头
    turtle.fillcolor("pink")
    turtle.begin_fill()
    turtle.circle(30, steps=12)
    turtle.end_fill()
    
    # 眼睛
    turtle.fillcolor("white")
    turtle.begin_fill()
    turtle.circle(10)
    turtle.end_fill()

    turtle.penup()
    turtle.goto(-40,30)
    turtle.pendown()
    turtle.fillcolor("black")
    turtle.begin_fill()
    turtle.circle(5)
    turtle.end_fill()

    turtle.penup()
    turtle.goto(-40,-30)
    turtle.pendown()
    turtle.fillcolor("black")
    turtle.begin_fill()
    turtle.circle(5)
    turtle.end_fill()

    # 嘴巴
    turtle.penup()
    turtle.goto(-100,-80)
    turtle.pendown()
    turtle.pensize(5)
    turtle.right(90)
    turtle.circle(100,50)
    turtle.circle(120,30)

    turtle.penup()
    turtle.goto(100,0)
    turtle.write("Python成长之路", align="center", font=("Courier", 24, "bold"))

三、蟒蛇的颜色

蟒蛇的身体可以使用一个颜色列表中的颜色进行填充。我们可以使用random模块来随机选择一个颜色。

<pre><code>
import turtle
import random

# 颜色列表
colors = ["red", "orange", "yellow", "green", "blue", "purple"]

# 选择随机颜色的函数
def get_random_color():
    return random.choice(colors)

# 绘制函数
def draw_crazy_snake():
    turtle.setup(1000, 700)
    turtle.bgcolor("black")
    turtle.pensize(8)
    turtle.speed(10)
    length = 10
    angle = 80
    while True:
        turtle.pencolor(get_random_color())
        turtle.forward(length)
        turtle.right(angle)
        length += 2
        if length > 400:
            break

四、蟒蛇的社交网络

现在，我们让蟒蛇拥有一个社交网络。以下是Python代码：

<pre><code>
import turtle
import random

# 颜色列表
colors = ["red", "orange", "yellow", "green", "blue", "purple"]

# 选择随机颜色的函数
def get_random_color():
    return random.choice(colors)

# 绘制函数
def draw_crazy_snake():
    turtle.setup(1000, 700)
    turtle.bgcolor("black")
    turtle.pensize(8)
    turtle.speed(10)
    length = 10
    angle = 80
    turtle.up()
    turtle.backward(100)
    turtle.down()
    turtle.write("Let's Python", align="center", font=("Courier", 24, "bold"))
    while True:
        turtle.pencolor(get_random_color())
        turtle.forward(length)
        turtle.right(angle)
        length += 2
        if length > 400:
            break
    turtle.up()
    turtle.goto(-200, 250)
    turtle.write("Join us on Twitter @Python", font=("Courier", 16, "bold"))

以上就是绘制彩色蟒蛇的方法。尝试运行代码，让你的蟒蛇变得更加有趣吧！