Python基础综合练习

import turtle

def mygoto(x, y):
    turtle.up()
    turtle.goto(x,y)
    turtle.down()

def drawBigStar(x):
    turtle.begin_fill()
    for i in range(5):
        turtle.forward(x)
        turtle.right(144)
    turtle.end_fill()

def drawStar(x):
    turtle.begin_fill()
    for i in range(5):
        turtle.forward(x)
        turtle.left(144)
    turtle.end_fill()

mygoto(-250,200)
turtle.color("red")
turtle.fillcolor("red")
turtle.begin_fill();
for i in range(2):
    turtle.forward(600)
    turtle.right(90)
    turtle.forward(400)
    turtle.right(90)
turtle.end_fill()

mygoto(-220,110)
turtle.color("yellow")
turtle.fillcolor("yellow")
turtle.begin_fill()
drawBigStar(100)
turtle.end_fill()
for i in range(4):
    x=1
    if i in[0,3]:
        x=0
    mygoto(-100+x*50,150-i*45)
    turtle.left(15-i*15)
    drawBigStar(30)
mygoto(0,0)
turtle.hideturtle()
turtle.done();

字符串练习：

http://news.gzcc.cn/html/2017/xiaoyuanxinwen_1027/8443.html

取得校园新闻的编号

url = 'http://news.gzcc.cn/html/2017/xiaoyuanxinwen_1027/8443.html'
print(url[-14:-5])

https://docs.python.org/3/library/turtle.html

产生python文档的网址

addr1 = 'https://docs.python.org/3/library/'
addr2 = '.html'
addr = addr1 + 'turtle' + addr2
print(addr)

　　

http://news.gzcc.cn/html/xiaoyuanxinwen/4.html

产生校园新闻的一系列新闻页网址

for i in range(0,10):
    print('http://news.gzcc.cn/html/xiaoyuanxinwen/{}.html'.format(i))

　　

练习字符串内建函数：strip,lstrip,rstrip,split,count，replace

用函数得到校园新闻编号

str='http://news.gzcc.cn/html/2017/xiaoyuanxinwen_1027/8443.html'
print(str.rstrip('.html').split('_')[1])

　　

用函数统计一歌词(文章、小说)中单词出现的次数，替换标点符号为空格，用空格进行分词。