【python编程实例】python程序设计课程

系统管理员 2022-11-28 10:44 263阅读 0赞

### Python程序设计实例 ###

*   *   *  实例1：温度转换
         *  实例2：Python蟒蛇绘制
         *  实例3：天天向上的力量
         *  实例4：文本进度条
         *  实例5：身体质量指数BMI
         *  实例6：圆周率的计算
         *  实例7：七段数码管绘制
         *  实例8：科赫雪花小包裹
         *  实例9：基本统计值计算
         *  实例10：文本词频统计
         *  实例11：自动轨迹绘制
         *  实例12：政府工作报告词云
         *  实例13：体育竞技分析
         *  实例14：第三方库安装脚本
         *  实例15：霍兰德人格分析雷达图
         *  实例16：玫瑰花绘制

### 实例1：温度转换 ###

#TempConvert.py
    TempStr = input("请输入带有符号的温度值: ")
    if TempStr[-1] in ['F', 'f']:
        C = (eval(TempStr[0:-1]) - 32)/1.8
        print("转换后的温度是{:.2f}C".format(C))
    elif TempStr[-1] in ['C', 'c']:
        F = 1.8*eval(TempStr[0:-1]) + 32
        print("转换后的温度是{:.2f}F".format(F))
    else:
        print("输入格式错误")

本实例所涉及函数：

<table> 
 <thead> 
  <tr> 
   <th>函数</th> 
   <th>解释</th> 
   <th>备注</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td><code>input()</code></td> 
   <td>从控制台获得用户输入的函数</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td><code>print()</code></td> 
   <td>以字符形式向控制台输出结果的函数</td> 
   <td></td> 
  </tr> 
  <tr> 
   <td><code>eval()</code></td> 
   <td>去掉参数最外侧引号并执行余下语句的函数</td> 
   <td><a href="https://blog.csdn.net/weixin_43964993/article/details/108053722" rel="nofollow">了解更多</a></td> 
  </tr> 
 </tbody> 
</table>

### 实例2：Python蟒蛇绘制 ###

#PythonDraw.py
    import turtle
    turtle.setup(650, 350, 200, 200)
    turtle.penup()
    turtle.fd(-250)
    turtle.pendown()
    turtle.pensize(25)
    turtle.pencolor("purple")
    turtle.seth(-40)
    for i in range(4):
        turtle.circle(40, 80)
        turtle.circle(-40, 80)
    turtle.circle(40, 80/2)
    turtle.fd(40)
    turtle.circle(16, 180)
    turtle.fd(40 * 2/3)
    turtle.done()

本实例所涉及python库：`turtle`：海龟绘图体系

### 实例3：天天向上的力量 ###

#DayDayUpQ1.py
    dayup = pow(1.001, 365)
    daydown = pow(0.999, 365)
    print("向上：{:.2f}，向下：{:.2f}".format(dayup, daydown))

#DayDayUpQ2.py
    dayfactor = 0.019
    dayup = pow(1+dayfactor, 365)
    daydown = pow(1-dayfactor, 365)
    print("向上：{:.2f}，向下：{:.2f}".format(dayup, daydown))

#DayDayUpQ3.py
    dayup = 1.0
    dayfactor = 0.01
    for i in range(365):
       if i % 7 in [6,0]:
           dayup = dayup*(1-dayfactor)
       else:
           dayup = dayup*(1+dayfactor)
    print("工作日的力量：{:.2f} ".format(dayup))

#DayDayUpQ4.py
    def dayUP(df):
        dayup = 1
        for i in range(365):
           if i % 7 in [6,0]:
               dayup = dayup*(1 - 0.01)
           else:
               dayup = dayup*(1 + df)
        return dayup
    dayfactor = 0.01
    while dayUP(dayfactor)<37.78:
        dayfactor += 0.001
    print("工作日的努力参数是：{:.3f} ".format(dayfactor))

### 实例4：文本进度条 ###

#TextProBarV1.py
    import time
    scale = 10
    print("------执行开始------")
    for i in range(scale+1):
        a = '*' * i
        b = '.' * (scale - i)
        c = (i/scale)*100
        print("{:^3.0f}%[{}->{}]".format(c,a,b))
        time.sleep(0.1)
    print("------执行结束------")

#TextProBarV2.py
    import time
    for i in range(101):
        print("\r{:3}%".format(i), end="")
        time.sleep(0.1)

#TextProBarV3.py
    import time
    scale = 50
    print("执行开始".center(scale//2,'-'))
    start = time.perf_counter()
    for i in range(scale+1):
        a = '*' * i
        b = '.' * (scale - i)
        c = (i/scale)*100
        dur = time.perf_counter() - start
        print("\r{:^3.0f}%[{}->{}]{:.2f}s".format(c,a,b,dur),end='')
        time.sleep(0.1)
    print("\n"+"执行结束".center(scale//2,'-'))

### 实例5：身体质量指数BMI ###

#CalBMIv1.py
    height, weight = eval(input("请输入身高(米)和体重(公斤)[逗号隔开]: "))
    bmi = weight / pow(height, 2)
    print("BMI 数值为：{:.2f}".format(bmi))
    who = ""
    if bmi < 18.5:
        who = "偏瘦"
    elif 18.5 <= bmi < 25:
        who = "正常"
    elif 25 <= bmi < 30:
        who = "偏胖"
    else:
        who = "肥胖"
    print("BMI 指标为:国际'{0}'".format(who))

#CalBMIv2.py
    height, weight = eval(input("请输入身高(米)和体重(公斤)[逗号隔开]: "))
    bmi = weight / pow(height, 2)
    print("BMI 数值为：{:.2f}".format(bmi))
    nat = ""
    if bmi < 18.5:
        nat = "偏瘦"
    elif 18.5 <= bmi < 24:
        nat = "正常"
    elif 24 <= bmi < 28:
        nat = "偏胖"
    else:
        nat = "肥胖"
    print("BMI 指标为:国内'{0}'".format(nat))

#CalBMIv3.py
    height, weight = eval(input("请输入身高(米)和体重(公斤)[逗号隔开]: "))
    bmi = weight / pow(height, 2)
    print("BMI 数值为：{:.2f}".format(bmi))
    who, nat = "", ""
    if bmi < 18.5:
        who, nat = "偏瘦", "偏瘦"
    elif 18.5 <= bmi < 24:
        who, nat = "正常", "正常"
    elif 24 <= bmi < 25:
        who, nat = "正常", "偏胖"
    elif 25 <= bmi < 28:
        who, nat = "偏胖", "偏胖"
    elif 28 <= bmi < 30:
        who, nat = "偏胖", "肥胖"
    else:
        who, nat = "肥胖", "肥胖"
    print("BMI 指标为:国际'{0}', 国内'{1}'".format(who, nat))

### 实例6：圆周率的计算 ###

#CalPiV1.py
    pi = 0
    N = 100
    for k in range(N):
        pi += 1/pow(16,k)*( \
                  4/(8*k+1) - 2/(8*k+4) - \
                  1/(8*k+5) - 1/(8*k+6) ) 
    print("圆周率值是: {}".format(pi))

#CalPiV2.py
    from random import random
    from time import perf_counter
    DARTS = 1000*1000
    hits = 0.0
    start = perf_counter()
    for i in range(1, DARTS+1):
        x, y = random(), random()
        dist = pow(x ** 2 + y ** 2, 0.5)
        if dist <= 1.0:
            hits = hits + 1
    pi = 4 * (hits/DARTS)
    print("圆周率值是: {}".format(pi))
    print("运行时间是: {:.5f}s".format(perf_counter() - start))

### 实例7：七段数码管绘制 ###

#SevenDigitsDrawV1.py
    import turtle
    def drawLine(draw):   #绘制单段数码管
        turtle.pendown() if draw else turtle.penup()
        turtle.fd(40)
        turtle.right(90)
    def drawDigit(digit): #根据数字绘制七段数码管
        drawLine(True) if digit in [2,3,4,5,6,8,9] else drawLine(False)
        drawLine(True) if digit in [0,1,3,4,5,6,7,8,9] else drawLine(False)
        drawLine(True) if digit in [0,2,3,5,6,8,9] else drawLine(False)
        drawLine(True) if digit in [0,2,6,8] else drawLine(False)
        turtle.left(90)
        drawLine(True) if digit in [0,4,5,6,8,9] else drawLine(False)
        drawLine(True) if digit in [0,2,3,5,6,7,8,9] else drawLine(False)
        drawLine(True) if digit in [0,1,2,3,4,7,8,9] else drawLine(False)
        turtle.left(180)
        turtle.penup()
        turtle.fd(20) 
    def drawDate(date):  #获得要输出的数字
        for i in date:
            drawDigit(eval(i))  #通过eval()函数将数字变为整数
    def main():
        turtle.setup(800, 350, 200, 200)
        turtle.penup()
        turtle.fd(-300)
        turtle.pensize(5)
        drawDate('20181010')
        turtle.hideturtle()
        turtle.done()
    main()

#SevenDigitsDrawV2.py
    import turtle, time
    def drawGap(): #绘制数码管间隔
        turtle.penup()
        turtle.fd(5)
    def drawLine(draw):   #绘制单段数码管
        drawGap()
        turtle.pendown() if draw else turtle.penup()
        turtle.fd(40)
        drawGap()
        turtle.right(90)
    def drawDigit(d): #根据数字绘制七段数码管
        drawLine(True) if d in [2,3,4,5,6,8,9] else drawLine(False)
        drawLine(True) if d in [0,1,3,4,5,6,7,8,9] else drawLine(False)
        drawLine(True) if d in [0,2,3,5,6,8,9] else drawLine(False)
        drawLine(True) if d in [0,2,6,8] else drawLine(False)
        turtle.left(90)
        drawLine(True) if d in [0,4,5,6,8,9] else drawLine(False)
        drawLine(True) if d in [0,2,3,5,6,7,8,9] else drawLine(False)
        drawLine(True) if d in [0,1,2,3,4,7,8,9] else drawLine(False)
        turtle.left(180)
        turtle.penup()
        turtle.fd(20)
    def drawDate(date):
        turtle.pencolor("red")
        for i in date:
            if i == '-':
                turtle.write('年',font=("Arial", 18, "normal"))
                turtle.pencolor("green")
                turtle.fd(40)
            elif i == '=':
                turtle.write('月',font=("Arial", 18, "normal"))
                turtle.pencolor("blue")
                turtle.fd(40)
            elif i == '+':
                turtle.write('日',font=("Arial", 18, "normal"))
            else:
                drawDigit(eval(i))
    def main():
        turtle.setup(800, 350, 200, 200)
        turtle.penup()
        turtle.fd(-350)
        turtle.pensize(5)
    # drawDate('2018-10=10+')
        drawDate(time.strftime('%Y-%m=%d+',time.gmtime()))
        turtle.hideturtle()
        turtle.done()
    main()

### 实例8：科赫雪花小包裹 ###

#KochDrawV1.py
    import turtle
    def koch(size, n):
        if n == 0:
            turtle.fd(size)
        else:
            for angle in [0, 60, -120, 60]:
               turtle.left(angle)
               koch(size/3, n-1)
    def main():
        turtle.setup(800,400)
        turtle.penup()
        turtle.goto(-300, -50)
        turtle.pendown()
        turtle.pensize(2)
        koch(600,3)     # 0阶科赫曲线长度，阶数
        turtle.hideturtle()
    main()

#KochDrawV2.py
    import turtle
    def koch(size, n):
        if n == 0:
            turtle.fd(size)
        else:
            for angle in [0, 60, -120, 60]:
               turtle.left(angle)
               koch(size/3, n-1)
    def main():
        turtle.setup(600,600)
        turtle.penup()
        turtle.goto(-200, 100)
        turtle.pendown()
        turtle.pensize(2)
        level = 3      # 3阶科赫雪花，阶数
        koch(400,level)     
        turtle.right(120)
        koch(400,level)
        turtle.right(120)
        koch(400,level)
        turtle.hideturtle()
    main()

### 实例9：基本统计值计算 ###

#CalStatisticsV1.py
    def getNum():       #获取用户不定长度的输入
        nums = []
        iNumStr = input("请输入数字(回车退出): ")
        while iNumStr != "":
            nums.append(eval(iNumStr))
            iNumStr = input("请输入数字(回车退出): ")
        return nums
    
    def mean(numbers):  #计算平均值
        s = 0.0
        for num in numbers:
            s = s + num
        return s / len(numbers)
    
    def dev(numbers, mean): #计算方差
        sdev = 0.0
        for num in numbers:
            sdev = sdev + (num - mean)**2
        return pow(sdev / (len(numbers)-1), 0.5)
    
    def median(numbers):    #计算中位数
        sorted(numbers)
        size = len(numbers)
        if size % 2 == 0:
            med = (numbers[size//2-1] + numbers[size//2])/2
        else:
            med = numbers[size//2]
        return med
    
    n =  getNum() #主体函数
    m =  mean(n)
    print("平均值:{},方差:{:.2},中位数:{}.".format(m, dev(n,m),median(n)))

### 实例10：文本词频统计 ###

#CalHamletV1.py
    def getText():
        txt = open("hamlet.txt", "r").read()
        txt = txt.lower()
        for ch in '!"#$%&()*+,-./:;<=>?@[\\]^_‘{|}~':
            txt = txt.replace(ch, " ")   #将文本中特殊字符替换为空格
        return txt
    
    hamletTxt = getText()
    words  = hamletTxt.split()
    counts = { }
    for word in words:			
        counts[word] = counts.get(word,0) + 1
    items = list(counts.items())
    items.sort(key=lambda x:x[1], reverse=True) 
    for i in range(10):
        word, count = items[i]
        print ("{0:<10}{1:>5}".format(word, count))

#CalThreeKingdomsV1.py
    import jieba
    txt = open("threekingdoms.txt", "r", encoding='utf-8').read()
    words  = jieba.lcut(txt)
    counts = { }
    for word in words:
        if len(word) == 1:
            continue
        else:
            counts[word] = counts.get(word,0) + 1
    items = list(counts.items())
    items.sort(key=lambda x:x[1], reverse=True) 
    for i in range(15):
        word, count = items[i]
        print ("{0:<10}{1:>5}".format(word, count))

#CalThreeKingdomsV2.py
    import jieba
    excludes = { "将军","却说","荆州","二人","不可","不能","如此","商议","如何",\
                "主公","军士","左右","军马","引兵","次日","大喜","天下","东吴",\
                "于是","今日","不敢","魏兵","陛下","一人","都督","人马","不知",\
                "汉中","只见","众将","后主","蜀兵","上马","大叫","太守","此人",\
                "夫人","先主","后人","背后","城中","天子","一面","何不","大军",\
                "忽报","先生","百姓","何故","然后","先锋","不如","赶来"}
    txt = open("threekingdoms.txt", "r", encoding='utf-8').read()
    words  = jieba.lcut(txt)
    counts = { }
    for word in words:
        if len(word) == 1:
            continue
        elif word == "诸葛亮" or word == "孔明曰":
            rword = "孔明"
        elif word == "关公" or word == "云长":
            rword = "关羽"
        elif word == "玄德" or word == "玄德曰":
            rword = "刘备"
        elif word == "孟德" or word == "丞相":
            rword = "曹操"
        else:
            rword = word
        counts[rword] = counts.get(rword,0) + 1
    for word in excludes:
        del counts[word]
    items = list(counts.items())
    items.sort(key=lambda x:x[1], reverse=True) 
    for i in range(15):
        word, count = items[i]
        print ("{0:<10}{1:>5}".format(word, count))

### 实例11：自动轨迹绘制 ###

#AutoTraceDraw.py
    import turtle as t
    t.title('自动轨迹绘制')
    t.setup(800, 600, 0, 0)
    t.pencolor("red")
    t.pensize(5)
    #数据读取
    datals = []
    f = open("data.txt")
    for line in f:
        line = line.replace("\n","")
        datals.append(list(map(eval, line.split(","))))
    f.close()
    #自动绘制
    for i in range(len(datals)):
        t.pencolor(datals[i][3],datals[i][4],datals[i][5])
        t.fd(datals[i][0])
        if datals[i][1]:
            t.rt(datals[i][2])
        else:
            t.lt(datals[i][2])

其中文件 `data.txt` 如下：

300,0,144,1,0,0
    300,0,144,0,1,0
    300,0,144,0,0,1
    300,0,144,1,1,0
    300,0,108,0,1,1
    184,0,72,1,0,1
    184,0,72,0,0,0
    184,0,72,0,0,0
    184,0,72,0,0,0
    184,1,72,1,0,1
    184,1,72,0,0,0
    184,1,72,0,0,0
    184,1,72,0,0,0
    184,1,72,0,0,0
    184,1,720,0,0,0

### 实例12：政府工作报告词云 ###

#GovRptWordCloudv1.py
    import jieba
    import wordcloud
    f = open("新时代中国特色社会主义.txt", "r", encoding="utf-8")
    
    t = f.read()
    f.close()
    ls = jieba.lcut(t)
    
    txt = " ".join(ls)
    w = wordcloud.WordCloud( \
        width = 1000, height = 700,\
        background_color = "white",
        font_path = "msyh.ttc"    
        )
    w.generate(txt)
    w.to_file("grwordcloud.png")

#GovRptWordCloudv1.py
    import jieba
    import wordcloud
    f = open("关于实施乡村振兴战略的意见.txt", "r", encoding="utf-8")
    
    t = f.read()
    f.close()
    ls = jieba.lcut(t)
    
    txt = " ".join(ls)
    w = wordcloud.WordCloud( \
        width = 1000, height = 700,\
        background_color = "white",
        font_path = "msyh.ttc"    
        )
    w.generate(txt)
    w.to_file("grwordcloud.png")

#GovRptWordCloudv1.py
    import jieba
    import wordcloud
    f = open("新时代中国特色社会主义.txt", "r", encoding="utf-8")
    
    t = f.read()
    f.close()
    ls = jieba.lcut(t)
    
    txt = " ".join(ls)
    w = wordcloud.WordCloud( \
        width = 1000, height = 700,\
        background_color = "white",
        font_path = "msyh.ttc", max_words = 15
        )
    w.generate(txt)
    w.to_file("grwordcloud.png")

#GovRptWordCloudv1.py
    import jieba
    import wordcloud
    f = open("关于实施乡村振兴战略的意见.txt", "r", encoding="utf-8")
    
    t = f.read()
    f.close()
    ls = jieba.lcut(t)
    
    txt = " ".join(ls)
    w = wordcloud.WordCloud( \
        width = 1000, height = 700,\
        background_color = "white",
        font_path = "msyh.ttc",
        max_words = 15
        )
    w.generate(txt)
    w.to_file("grwordcloud.png")

#GovRptWordCloudv2.py
    import jieba
    import wordcloud
    from scipy.misc import imread
    mask = imread("fivestart.png")
    excludes = {  }
    f = open("新时代中国特色社会主义.txt", "r", encoding="utf-8")
    t = f.read()
    f.close()
    ls = jieba.lcut(t)
    txt = " ".join(ls)
    w = wordcloud.WordCloud(\
        width = 1000, height = 700,\
        background_color = "white",
        font_path = "msyh.ttc", mask = mask
        )
    w.generate(txt)
    w.to_file("grwordcloudm.png")

#GovRptWordCloudv2.py
    import jieba
    import wordcloud
    from scipy.misc import imread
    mask = imread("chinamap.jpg")
    excludes = {  }
    f = open("新时代中国特色社会主义.txt", "r", encoding="utf-8")
    t = f.read()
    f.close()
    ls = jieba.lcut(t)
    txt = " ".join(ls)
    w = wordcloud.WordCloud(\
        width = 1000, height = 700,\
        background_color = "white",
        font_path = "msyh.ttc", mask = mask
        )
    w.generate(txt)
    w.to_file("grwordcloudm.png")

#GovRptWordCloudv2.py
    import jieba
    import wordcloud
    from scipy.misc import imread
    mask = imread("chinamap.jpg")
    excludes = {  }
    f = open("关于实施乡村振兴战略的意见.txt", "r", encoding="utf-8")
    t = f.read()
    f.close()
    ls = jieba.lcut(t)
    txt = " ".join(ls)
    w = wordcloud.WordCloud(\
        width = 1000, height = 700,\
        background_color = "white",
        font_path = "msyh.ttc", mask = mask
        )
    w.generate(txt)
    w.to_file("grwordcloudm.png")

### 实例13：体育竞技分析 ###

#MatchAnalysis.py
    from random import random
    def printIntro():
        print("这个程序模拟两个选手A和B的某种竞技比赛")
        print("程序运行需要A和B的能力值（以0到1之间的小数表示）")
    def getInputs():
        a = eval(input("请输入选手A的能力值(0-1): "))
        b = eval(input("请输入选手B的能力值(0-1): "))
        n = eval(input("模拟比赛的场次: "))
        return a, b, n
    def simNGames(n, probA, probB):
        winsA, winsB = 0, 0
        for i in range(n):
            scoreA, scoreB = simOneGame(probA, probB)
            if scoreA > scoreB:
                winsA += 1
            else:
                winsB += 1
        return winsA, winsB
    def gameOver(a,b):
        return a==15 or b==15
    def simOneGame(probA, probB):
        scoreA, scoreB = 0, 0
        serving = "A"
        while not gameOver(scoreA, scoreB):
            if serving == "A":
                if random() < probA:
                    scoreA += 1
                else:
                    serving="B"
            else:
                if random() < probB:
                    scoreB += 1
                else:
                    serving="A"
        return scoreA, scoreB
    def printSummary(winsA, winsB):
        n = winsA + winsB
        print("竞技分析开始，共模拟{}场比赛".format(n))
        print("选手A获胜{}场比赛，占比{:0.1%}".format(winsA, winsA/n))
        print("选手B获胜{}场比赛，占比{:0.1%}".format(winsB, winsB/n))
    def main():
        printIntro()
        probA, probB, n = getInputs()
        winsA, winsB = simNGames(n, probA, probB)
        printSummary(winsA, winsB)
    main()

### 实例14：第三方库安装脚本 ###

#BatchInstall.py
    import os
    libs = { "numpy","matplotlib","pillow","sklearn","requests",\
            "jieba","beautifulsoup4","wheel","networkx","sympy",\
            "pyinstaller","django","flask","werobot","pyqt5",\
            "pandas","pyopengl","pypdf2","docopt","pygame"}
    try:
        for lib in libs:
            os.system("pip3 install "+lib)
        print("Successful")        
    except:
        print("Failed Somehow")

### 实例15：霍兰德人格分析雷达图 ###

#HollandRadarDraw
    import numpy as np
    import matplotlib.pyplot as plt
    import matplotlib
    matplotlib.rcParams['font.family']='SimHei'
    radar_labels = np.array(['研究型(I)','艺术型(A)','社会型(S)',\
                             '企业型(E)','常规型(C)','现实型(R)']) #雷达标签
    nAttr = 6
    data = np.array([[0.40, 0.32, 0.35, 0.30, 0.30, 0.88],
                     [0.85, 0.35, 0.30, 0.40, 0.40, 0.30],
                     [0.43, 0.89, 0.30, 0.28, 0.22, 0.30],
                     [0.30, 0.25, 0.48, 0.85, 0.45, 0.40],
                     [0.20, 0.38, 0.87, 0.45, 0.32, 0.28],
                     [0.34, 0.31, 0.38, 0.40, 0.92, 0.28]]) #数据值
    data_labels = ('艺术家', '实验员', '工程师', '推销员', '社会工作者','记事员')
    angles = np.linspace(0, 2*np.pi, nAttr, endpoint=False)
    data = np.concatenate((data, [data[0]]))
    angles = np.concatenate((angles, [angles[0]]))
    fig = plt.figure(facecolor="white")
    plt.subplot(111, polar=True)
    plt.plot(angles,data,'o-', linewidth=1, alpha=0.2)
    plt.fill(angles,data, alpha=0.25)
    plt.thetagrids(angles*180/np.pi, radar_labels,frac = 1.2)
    plt.figtext(0.52, 0.95, '霍兰德人格分析', ha='center', size=20)
    legend = plt.legend(data_labels, loc=(0.94, 0.80), labelspacing=0.1)
    plt.setp(legend.get_texts(), fontsize='large')
    plt.grid(True)
    plt.savefig('holland_radar.jpg')
    plt.show()

### 实例16：玫瑰花绘制 ###

#RoseDraw.py
    import turtle as t
    # 定义一个曲线绘制函数
    def DegreeCurve(n, r, d=1):
        for i in range(n):
            t.left(d)
            t.circle(r, abs(d))
    # 初始位置设定
    s = 0.2 # size
    t.setup(450*5*s, 750*5*s)
    t.pencolor("black")
    t.fillcolor("red")
    t.speed(100)
    t.penup()
    t.goto(0, 900*s)
    t.pendown()
    # 绘制花朵形状
    t.begin_fill()
    t.circle(200*s,30)
    DegreeCurve(60, 50*s)
    t.circle(200*s,30)
    DegreeCurve(4, 100*s)
    t.circle(200*s,50)
    DegreeCurve(50, 50*s)
    t.circle(350*s,65)
    DegreeCurve(40, 70*s)
    t.circle(150*s,50)
    DegreeCurve(20, 50*s, -1)
    t.circle(400*s,60)
    DegreeCurve(18, 50*s)
    t.fd(250*s)
    t.right(150)
    t.circle(-500*s,12)
    t.left(140)
    t.circle(550*s,110)
    t.left(27)
    t.circle(650*s,100)
    t.left(130)
    t.circle(-300*s,20)
    t.right(123)
    t.circle(220*s,57)
    t.end_fill()
    # 绘制花枝形状
    t.left(120)
    t.fd(280*s)
    t.left(115)
    t.circle(300*s,33)
    t.left(180)
    t.circle(-300*s,33)
    DegreeCurve(70, 225*s, -1)
    t.circle(350*s,104)
    t.left(90)
    t.circle(200*s,105)
    t.circle(-500*s,63)
    t.penup()
    t.goto(170*s,-30*s)
    t.pendown()
    t.left(160)
    DegreeCurve(20, 2500*s)
    DegreeCurve(220, 250*s, -1)
    # 绘制一个绿色叶子
    t.fillcolor('green')
    t.penup()
    t.goto(670*s,-180*s)
    t.pendown()
    t.right(140)
    t.begin_fill()
    t.circle(300*s,120)
    t.left(60)
    t.circle(300*s,120)
    t.end_fill()
    t.penup()
    t.goto(180*s,-550*s)
    t.pendown()
    t.right(85)
    t.circle(600*s,40)
    # 绘制另一个绿色叶子
    t.penup()
    t.goto(-150*s,-1000*s)
    t.pendown()
    t.begin_fill()
    t.rt(120)
    t.circle(300*s,115)
    t.left(75)
    t.circle(300*s,100)
    t.end_fill()
    t.penup()
    t.goto(430*s,-1070*s)
    t.pendown()
    t.right(30)
    t.circle(-600*s,35)
    t.done()

--------------------

资料来源于：[中国大学mooc][mooc]

[mooc]: https://www.icourse163.org/learn/BIT-268001?tid=1450323450