Python基础综合练习

import  turtle

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

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

turtle.setup(600,400,0,0)
turtle.color("yellow")
turtle.bgcolor("red")
turtle.fillcolor("yellow")
turtle.hideturtle()

mygoto(-260,120)
draw(90)

for i in range(4):
   x=1
   if i in[0,3]:
      x = 0
   mygoto(-120+x*40,160-i*40)
   turtle.left(15-i*15)
   draw(30)

turtle.done()

取得校园新闻的编号

str1 ="http://news.gzcc.cn/html/2017/xiaoyuanxinwen_1027/8443.html"
print(str1[-9:-5])

产生python文档的网址

str2 ="https://docs.python.org/3/library/turtle.html"
print(str2.replace("turtle","python"))

产生校园新闻的一系列新闻页网址:

area1 = "http://news.gzcc.cn/html/xiaoyuanxinwen/"
area2 = ".html"

for i in range(2,13):
   area = area1 + str(i) + area2
   str3 = "http://news.gzcc.cn/html/xiaoyuanxinwen/{}.html".format(i)
   print(str3,area)

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

用函数得到校园新闻编号

str4 ="http://news.gzcc.cn/html/2017/xiaoyuanxinwen_1027/8443.html"
print (str4.split('_',2)[1].rstrip(".html"))

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。

str5 = '''Come with me for a little ride, see the shadows passing by
Look at the sun and see the clouds turn to faces in the sky
We've been awake all night, shattered dreams all around
Close your sad, sad eyes we will be safe and sound

Come with me for a little ride, see the shadows passing by
Look at the sun and see the clouds turn to faces in the sky
Daydreaming lightly through the rainAll's forgiven on a summer train

Come with me for a little ride, see the shadows passing by
Seems we are a thousand miles away from last night
As you sigh in my ear, kiss the rain goodbye

Come with me for a little ride, see the shadows passing by
Look at the sun and see the clouds turn to faces in the sky
Daydreaming lightly through the rain
All's forgiven on a summer train

Come with me for a little ride, see the shadows passing by
Come away with me, it's gonna be all right just breathe
Come away with me, it's gonna be all right you'll see

And the wind .... this train is flying us all through the rain, I fear
And the sky is getting brighter with every mile
And it all seems clear

Come with me for a little ride, see the shadows passing by
Look at the sun and see the clouds turn to faces in the sky
Daydreaming lightly through the rain
All's forgiven on a summer train

Come with me for a little ride, see the shadows passing by
Come away with me, it's gonna be all right just breathe
Come away with me, it's gonna be all right you'll see

Come away with me, it's gonna be all right just breathe
Come away with me, it's gonna be all right you'll see, you'll see
Come away with me'''

print(str5.count("Come"))
print(str5.replace(","," "))
print(str5.split())