Python画图练习案例分享

# 多边形的绘制案例 import turtle def main(): turtle.color("green") # steps代表多边形的绘制 turtle.circle(50,steps=6) turtle.exitonclick() if __name__ == "__main__": main()

# 太阳花案例******************************************************************* import turtle import time turtle.color("red","yellow") turtle.begin_fill() for _ in range(50): turtle.speed(0) turtle.forward(200) turtle.left(170) turtle.end_fill() turtle.mainloop()

# 颜色五角星案例****************************************************************** import turtle import time turtle.pensize(5) turtle.pencolor("yellow") turtle.fillcolor("red") turtle.begin_fill() for _ in range(5): turtle.forward(200) turtle.right(144) turtle.end_fill() time.sleep(2) turtle.penup() turtle.goto(-150,-120) turtle.color("violet") turtle.write("Done",font=("Arial")) turtle.mainloop()

# 艺术图片************************************************************************* import turtle turtle.speed(0) turtle.delay(0) turtle.pensize(2) turtle.bgcolor("black") colors=["red","blue","yellow","purple"] for x in range(300): turtle.color(colors[x%4]) turtle.forward(2*x) turtle.left(91) turtle.done()

# #黑六边形***************************************************************************** import turtle def bye(x,y): turtle.bye() s = turtle.Screen() s.bgcolor("black") s.screensize(800,800) s.title("Class Using") s.onscreenclick(bye) p=turtle.Turtle() p.speed(0) p.hideturtle() p.pencolor("red") p.pensize(3) p.circle(50,360,6) turtle.done()

#绘制时钟************************************************************************************************ import turtle as tt from datetime import * # 当前日期属于一周的第几天 def Week(t): week = ["星期一", "星期二", "星期三", "星期四", "星期五", "星期六", "星期日"] return week[t.weekday()] # 获取当前时间 def Date(t): y = t.year m = t.month d = t.day cur_hour = t.hour; cur_min = t.minute; cur_sec = t.second; return "%s-%d-%d %d:%02d:%02d" % (y, m, d, cur_hour, cur_min, cur_sec) # 移动画笔,距离为distance def movePen(distance): tt.penup() tt.pensize(5) tt.pencolor("blue") tt.fd(distance) tt.pendown() # 绘制表针 def makeHands(name, length): # 清空窗口，重置turtule状态为初始状态 tt.reset() movePen(-length * 0.1) # 开始记录多边形的顶点 tt.begin_poly() tt.fd(length * 1.1) # 停止记录多边形的顶点 tt.end_poly() # 返回记录的多边形 handForm = tt.get_poly() tt.register_shape(name, handForm) # 初始化 def initial(): global secHand, minHand, hurHand, printer # 重置方向向北(上)，正角度为顺时针 tt.mode("logo") # 建立并初始化表针 makeHands("secHand", 180) makeHands("minHand", 150) makeHands("hurHand", 110) secHand = tt.Turtle() secHand.shape("secHand") minHand = tt.Turtle() minHand.shape("minHand") hurHand = tt.Turtle() hurHand.shape("hurHand") for hand in secHand, minHand, hurHand: hand.shapesize(1, 1, 4) hand.speed(0) # 输出文字 printer = tt.Turtle() # 隐藏画笔 printer.hideturtle() printer.penup() # 绘制表盘外框 def drawClock(R): # 清空窗口，重置turtule状态为初始状态 tt.reset() # 画笔尺寸 tt.pensize(5) for i in range(60): movePen(R) if i % 5 == 0: tt.fd(20) movePen(-R - 20) movePen(R + 20) if i == 0: # 写文本 tt.write(int(12), align="center", font=("Consolas", 14, "bold")) elif i == 30: movePen(25) tt.write(int(i / 5), align="center", font=("Consolas", 14, "bold")) movePen(-25) elif (i == 25 or i == 35): movePen(20) tt.write(int(i / 5), align="center", font=("Consolas", 14, "bold")) movePen(-20) else: tt.write(int(i / 5), align="center", font=("Consolas", 14, "bold")) movePen(-R - 20) else: # 绘制指定半径和颜色的点 tt.dot(5, "red") movePen(-R) tt.right(6) # 表针的动态显示 def handsMove(): t = datetime.today() second = t.second + t.microsecond * 0.000001 minute = t.minute + second / 60.0 hour = t.hour + minute / 60.0 secHand.seth(6 * second) minHand.seth(6 * minute) hurHand.seth(30 * hour) tt.tracer(False) printer.fd(65) tt.pencolor("green") printer.write(Week(t), align="center", font = ("黑体", 14)) printer.back(130) printer.write(Date(t), align="center", font = ("Consolas", 14)) # 设置当前画笔位置为原点，方向朝东 printer.home() tt.tracer(True) # 经过100ms后继续调用handsMove函数 tt.ontimer(handsMove, 100) # 调用定义的函数，打开和关闭动画，为更新图纸设置延迟； tt.tracer(False) initial() drawClock(200) tt.tracer(True) handsMove() tt.mainloop()

# 绘制分形树****************************************************************************** import turtle def draw_branch(branch_length): ''' 绘制分形树 ''' if branch_length > 5: # 绘制右侧树枝 turtle.forward(branch_length) print("向前：", branch_length) turtle.right(20) print("右转：20度") draw_branch(branch_length - 15) # 绘制左侧树枝 turtle.left(40) print("左转：40度") draw_branch(branch_length - 15) # 返回之前的树枝 turtle.right(20) print("右转：20度") turtle.backward(branch_length) print("向后：", branch_length) def main(): ''' 主函数 ''' turtle.speed(0.5) turtle.pensize(3) turtle.left(90) turtle.color('green') turtle.penup() turtle.backward(150) turtle.pendown() turtle.bgcolor("black") draw_branch(100) turtle.exitonclick() if __name__ == "__main__": main()

# 彩虹线绘制案例*************************************************************************** import turtle as t from random import randint as rint t.shape("turtle") t.pensize(5) t.colormode(255) t.bgcolor("black") t.tracer(False) for x in range(700): t.color(rint(0,255),rint(0,255),rint(0,255)) t.circle(2*(1+x/4),5) t.speed(0) t.tracer(True) t.exitonclick()