PY练习

from turtle import *

def position(x, y):
    up()
    goto(x, y)
    down()

def drawstar(size, x, y):
    position(x, y)
    color('yellow')
    begin_fill()
    fillcolor('yellow')
    for i in range(5):
        forward(size)
        if size == 150:
            right(144)
        else:
            left(144)
    end_fill()
bgcolor('red')

speed(5)
drawstar(150, -300, 160)

drawstar(50, -180, 250)
drawstar(50, -80, 200)
drawstar(50, -80, 90)
drawstar(50, -180, 10)

hideturtle()
done()

str1 ='Python!Python!Python'
print(str1)
print(str1[0])
print(str1[2:5])
print(str1[2:])
print(str1 * 2)

html1 = 'http://news.gzcc.cn/html/2018/xiaoyuanxinwen_0314/9024.html'
print(html1[-14:-5], '\n ----------------------')

html_end = '.html'
html2 = 'https://docs.python.org/dev/library/'
a = ['string', 'sys', 'turtle', 'os']
for g in a:
    html = html2 + str(g) + html_end
    print(html)
print('\n ----------------------')

new_html1 = 'http://news.gzcc.cn/html/2018/xiaoyuanxinwen/'
for i in range(0, 11):
    new = new_html1 + str(i) + html_end
    print(new)

 

a = ' There is  \n a python document \n ! is a good code!!!!'
print(a.strip(), '\n ---------------------')
print(a.lstrip(), '\n---------------------')
print(a.rsplit(), '\n---------------------')
print(a.count('!'), '\n---------------------')
print(a.count('is'), '\n---------------------')
print(a.split('\n'))