python 网页爬取数据生成文字云图

1. 需要的三个包:

from wordcloud import WordCloud        #词云库
import matplotlib.pyplot as plt #数学绘图库
import jieba;

2. 定义变量(将对于的变量到一个全局的文件中):

import re;
pdurl_first='https://movie.douban.com/subject/26363254/comments?start=0'
head={'User-Agent':'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/59.0.3071.109 Chrome/59.0.3071.109 Safari/537.36'}
reg=re.compile(r'<a href="(.*?)&amp;.*?class="next">') #下一页
cookies={"__utma":"30149280.503249607.1504402391.1504402391.1504402391.1",
"_utmb":"30149280.2.9.1504402391","__utmc":"","__utmt":"",
"__utmz":"30149280.1504402391.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none)",
"ap":"","as":'"https://movie.douban.com/subject/26363254/comments?start=225&limit=20&sort=new_score&status=P"',
"bid":"g7k4BGd2sRk","ck":"76vs","dbcl2":'"166279730:fohmXhoM9uU"',"ps":"y","push_doumail_num":"",
"push_doumail_num":""}

3. 抓取数据

import requests;
import re;
from GrabData import Param;
import pandas as pd;
from bs4 import BeautifulSoup; class GrabComent:
ren = re.compile(r'<span class="votes">(.*?)</span>.*?comment">.*?</span>.*?<span.*?class="">(.*?)</a>.*?<span>(.*?)</span>.*?title="(.*?)"></span>.*?title="(.*?)"><p .*? > (.*?)</p>',re.S)
def __init__(self):
print('开始抓取数据');
html = requests.get(Param.pdurl_first, headers=Param.head, cookies=Param.cookies);
while html.status_code == 200:
url_next = 'https://movie.douban.com/subject/26363254/comments' + re.findall(Param.reg, html.text)[0]
zhanlang = re.findall(self.ren, html.text)
print(zhanlang)
data = pd.DataFrame(zhanlang)
data.to_csv('H:\\python_projects\\ticket\\zhanlangpinglun.csv', header=False, index=False,
mode='a+') # 写入csv文件,'a+'是追加模式
data = []
zhanlang = []
print("下一页地址:"+url_next);
html = requests.get(url_next, cookies=Param.cookies, headers=Param.head) if __name__ == '__main__':
GrabComent();

4. 生成云图

from wordcloud import WordCloud        #词云库
import matplotlib.pyplot as plt #数学绘图库
import jieba; class WordYun: def __init__(self):
print("开始读取文件!");
self.main(); def main(self):
text = self.readFile();
self.showTitle(text); def showTitle(self,text1):
wc1 = WordCloud(
background_color="white",
width=1000,
height=860,
font_path="D:\\Windows\\Fonts\\STFANGSO.ttf", # 不加这一句显示口字形乱码
margin=2); wc2 = wc1.generate(text1) # 我们观察到generate()接受一个Unicode的对象,所以之前要把文本处理成unicode类型
plt.imshow(wc2)
plt.axis("off")
plt.show(); def readFile(self):
a = []
f = open(r'H:\\python_projects\\ticket\\zhanlangpinglun.csv', 'r').read()
words = list(jieba.cut(f))
for word in words:
if len(word) > 1:
a.append(word);
txt = r' '.join(a)
print("readFile返回的结果:"+txt);
return txt; if __name__ == '__main__':
WordYun();
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