python 第三课 爬虫

已安装python环境，cmd文件中运行以下三句话

python -m pip install requests

python -m pip install parsel

python -m pip install urllib3

爬虫原理是从网页源代码中抓取想要的数据

贴代码：从豆瓣网上抓取前10页的信息

from re import M, X from tkinter import Y
from matplotlib import pyplot as plt
import numpy as np from pyparsing import alphanums
X=np.random.randint(0,100,30) Y=np.random.randint(0,100,30) fig,ax=plt.subplot()
v = np.random.randint(0,100,30) ax.scatter(X,Y,s=200,c=v,alpha=0.7) i,j = 0,0 while i<30:     j = 0     #j=28,0-29     while j<29:         d = (X[i]-X[j+1])**2 + (Y[i]-Y[j+1])**2         if d <=2500:             ax.plot([X[i],X[j+1]],[Y[i],Y[j+1]])         j = j + 1     i = i + 1
plt.show() print(X,Y)