实验6
实验任务1
task1_1.py
实验源码:
from turtle import * def move(x,y): penup() goto(x,y) pendown() def draw(n,size=100): for i in range(n): fd(size) left(360/n) def main(): pensize(2) pencolor('red') move(-200,0) draw(3) move(0,0) draw(4) move(200,0) draw(5) hideturtle() done() main()
测试截图:
task1_2.py
实验源码:
from turtle import * def moveto(x,y): penup() goto(x,y) pendown() def main(): pensize(2) pencolor('blue') moveto(-150,0) circle(50) moveto(0,0) circle(50,steps = 4) moveto(150,0) circle(50,steps = 5) moveto(300,0) circle(50,steps = 6) hideturtle() done() main()
测试截图:
实验任务2
task2_1.py
实验源码:
from turtle import * def moveto(x,y): penup() goto(x,y) pendown() def main(): setup(800,600) radius=20 offset=20 for i in range(9): moveto(0,-radius) circle(radius) radius+=offset hideturtle() done() main()
测试截图:
task2_2.py
实验源码:
from turtle import * from random import random def moveto(x,y): penup() goto(x,y) pendown() def gen_color(): return tuple((random() for i in range(3))) def main(): setup(800,600) radius=180 offset=20 for i in range(8): moveto(0,-radius) color(gen_color()) begin_fill() circle(radius) radius-=offset hideturtle() done() main()
测试截图:

颜色每次都随机变化
能
radius=180修改为radius=20
radius-=offset修改为radius+=offset
实验任务3
task3_1.py
实验源码:
from turtle import * def square(size=50,rgb='orange'): pencolor(rgb) for i in range(4): fd(size) left(90) def main(): setup(800,600) speed(0) n=10 for i in range(n): square(80) left(360/n) hideturtle() done() main()
测试截图:
task3_2.py
实验源码:
from turtle import * setup(800,600) pencolor('pink') n=10 for i in range(10): for j in range(2): circle(80,90) left(90) right(360/n) hideturtle() done()
测试截图:
实验任务4
实验源码:
from turtle import * setup(800,600) bgcolor('black') pencolor('white') speed(0) angle=0 size=2 n=5 count=50 for i in range(count): fd(size) angle+=360/n seth(angle) size+=5 hideturtle() done()
测试截图:
实验任务5
task5_1.py
实验源码:
import turtle from math import * turtle.penup() turtle.goto(-100,-100) turtle.pendown() turtle.color('black','black') turtle.begin_fill() turtle.fd(200) turtle.seth(90) turtle.fd(200) turtle.seth(180) turtle.fd(200) turtle.seth(270) turtle.fd(200) turtle.end_fill() turtle.penup() turtle.goto(0,-100) turtle.pendown() turtle.color('red','red') turtle.begin_fill() turtle.seth(45) turtle.fd(100*sqrt(2)) turtle.seth(135) turtle.fd(100*sqrt(2)) turtle.seth(-135) turtle.fd(100*sqrt(2)) turtle.seth(-45) turtle.fd(100*sqrt(2)) turtle.end_fill() turtle.hideturtle() turtle.done()
测试截图:
task5_2.py
实验源码:
import turtle as t t.penup() t.goto(0,0) t.pensize(2) t.pencolor('blue') t.pendown() t.fd(120) t.seth(90) t.circle(120,90) t.seth(-90) t.fd(120) t.penup() t.seth(0) t.pendown() t.fd(100) t.seth(90) t.circle(100,90) t.seth(-90) t.fd(100) t.penup() t.seth(0) t.pendown() t.fd(80) t.seth(90) t.circle(80,90) t.seth(-90) t.fd(80) t.penup() t.seth(0) t.pendown() t.fd(60) t.seth(90) t.circle(60,90) t.seth(-90) t.fd(60) t.penup() t.seth(0) t.pendown() t.fd(40) t.seth(90) t.circle(40,90) t.seth(-90) t.fd(40) t.hideturtle() t.done()
测试截图:
实验任务6
实验源码:
import turtle as t t.penup() t.goto(0,0) t.pendown() t.bgcolor('black') t.color('yellow','yellow') t.begin_fill() t.circle(100) t.end_fill() t.penup() t.goto(0,100) t.pendown() t.begin_fill() t.color('black','black') t.seth(-45) t.fd(100) t.circle(100,270) t.seth(45) t.fd(100) t.end_fill() t.penup() t.goto(0,150) t.pendown() t.color('black','black') t.begin_fill() t.circle(10) t.end_fill() t.penup() t.goto(-10,158) t.pendown() t.color('white','white') t.begin_fill() t.circle(3) t.end_fill() t.hideturtle() t.done()
测试截图:
实验任务7
实验源码:
from matplotlib import pyplot as plt def func(x): return 4*x*(1-x) def gen_lst(x,n): ans = [] for i in range(n): t = func(x) ans.append(t) x = t return ans def main(): n=30 lst1 = gen_lst(0.2,n) lst2 = gen_lst(0.2000001,n) x=list(range(1,31)) plt.plot(x,lst1,'ro-',x,lst2,'bs-') plt.xticks(list(range(1,31,4))) plt.legend(['x=0.2','x=0.2000001']) plt.show() main()
测试截图:
实验任务8
实验源码:
import jieba from wordcloud import WordCloud from matplotlib import pyplot as plt text = '''requests是一个常用的HTTP请求库,可以方便地向网站发送HTTP请求,并获取响应结 果。 Scrapy是一个开源和协作框架,用于从网站中提取数据,是最流行的爬虫框架。 SciPy是一个开源的Python算法库和数学工具包,它基于Numpy,用于数学、科学、工程学等领 域。''' word=jieba.lcut(text) t=' '.join(word) t_wc=WordCloud(font_path='msyh.ttc').generate(t) t_wc.to_file('wordcloud.png') plt.imshow(t_wc) plt.axis('off') plt.show()
测试截图:

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