爬汽车之家

Posted 2020-12-05 guobaoyuan

爬汽车之家:

 

pip install requests
pip install BeautifulSoup

from bs4 import BeautifulSoup
import requests

ret = requests.get(‘https://www.autohome.com.cn/news/‘)
# 通过requests模块获取一个对象
ret.encoding = ‘gbk‘
# 改变显示格式
# print(ret.text)
#打印这个网站的字符串

soup = BeautifulSoup(ret.text,‘html.parser‘)
# 通过这个BeautifulSoup把字符串变成html对象

div=soup.find(name="div",attrs={"id":"auto-channel-lazyload-article"}) #find：找到与之相匹配的第一个标签

# print(div)
li_list=div.find_all(name="li") #fing_all:找到所有的

for li in li_list:
    # print("******************",li)
    title=li.find(name="h3")
    if not title:
        continue
    img=li.find(name="img")
    src=img.get("src")
    src="https:"+src            #图片链接

    #再次发起请求，下载图片
    file_name=src.rsplit("/",maxsplit=1)[1]  #以图片命名
    img_name = ‘img_file{}‘.format(file_name)
    ret=requests.get(src)   #再次发请求

    with open(file_name,"wb") as f:
        f.write(ret.content)   # 将图片二进制写进文件

　

python一行代码打印心

print(‘
‘.join([‘‘.join([(‘PYTHON!‘[(x-y)%7]if((x*0.05)**2+(y*0.1)**2-1)**3-(x*0.05)**2*(y*0.1)**3<=0 else‘ ‘)for x in range(-30,30)])for y in range(15,-15,-1)]))

　　

python画玫瑰花

import turtle

# 设置初始位置
turtle.penup()
turtle.left(90)
turtle.fd(200)
turtle.pendown()
turtle.right(90)

# 花蕊
turtle.fillcolor("red")
turtle.begin_fill()
turtle.circle(10, 180)
turtle.circle(25, 110)
turtle.left(50)
turtle.circle(60, 45)
turtle.circle(20, 170)
turtle.right(24)
turtle.fd(30)
turtle.left(10)
turtle.circle(30, 110)
turtle.fd(20)
turtle.left(40)
turtle.circle(90, 70)
turtle.circle(30, 150)
turtle.right(30)
turtle.fd(15)
turtle.circle(80, 90)
turtle.left(15)
turtle.fd(45)
turtle.right(165)
turtle.fd(20)
turtle.left(155)
turtle.circle(150, 80)
turtle.left(50)
turtle.circle(150, 90)
turtle.end_fill()

# 花瓣1
turtle.left(150)
turtle.circle(-90, 70)
turtle.left(20)
turtle.circle(75, 105)
turtle.setheading(60)
turtle.circle(80, 98)
turtle.circle(-90, 40)

# 花瓣2
turtle.left(180)
turtle.circle(90, 40)
turtle.circle(-80, 98)
turtle.setheading(-83)

# 叶子1
turtle.fd(30)
turtle.left(90)
turtle.fd(25)
turtle.left(45)
turtle.fillcolor("green")
turtle.begin_fill()
turtle.circle(-80, 90)
turtle.right(90)
turtle.circle(-80, 90)
turtle.end_fill()

turtle.right(135)
turtle.fd(60)
turtle.left(180)
turtle.fd(85)
turtle.left(90)
turtle.fd(80)

# 叶子2
turtle.right(90)
turtle.right(45)
turtle.fillcolor("green")
turtle.begin_fill()
turtle.circle(80, 90)
turtle.left(90)
turtle.circle(80, 90)
turtle.end_fill()

turtle.left(135)
turtle.fd(60)
turtle.left(180)
turtle.fd(60)
turtle.right(90)
turtle.circle(200, 60)

　　

python其他画图实例:

import turtle
t = turtle.Pen()
turtle.bgcolor("black")
sides=6
colors=["red","yellow","green","blue","orange","purple"]
for x in range(360):
    t.pencolor(colors[x%sides])
    t.forward(x*3/sides+x)
    t.left(360/sides+1)
    t.width(x*sides/200)



准备好辣眼睛吧
import turtle
t = turtle.Pen()
turtle.bgcolor("black")


my_name=turtle.textinput("输入你的姓名:")
colors=["red","yellow","purple","blue"]
for x in range(100):
    t.pencolor(colors[x%4])
    t.penup()
    t.forward(x*4)
    t.pendown()
    t.write(my_name,font=("Arial",int((x+4)/4),"bold"))
    t.left(92)