任务1

爬取网址：http://www.doupoxs.com/doupocangqiong
爬取内容：斗破苍穹的各章节正文
爬取方式：正则表达式 & BeautifulSoup（get_info2(url)，选用）

import requests
from bs4 import BeautifulSoup
import re
import time

base_url = "http://www.doupoxs.com/doupocangqiong"
headers = {'user-agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3294.6 Safari/537.36'}
r = requests.get(base_url, headers = headers)
soup = BeautifulSoup(r.text,"lxml")

def get_url():
    detail_urls = soup.select("div.book_list a")
    url_list = []
    for url in detail_urls:
        detail_url = url.get("href")
        all_url = "http://www.doupoxs.com" + detail_url
        url_list.append(all_url)
    return url_list

##正则表达式
def get_info(url):
    r = requests.get(url,headers = headers)
    dpcp_texts = re.findall('<p>(.*?)</p>',r.content.decode('utf-8'),re.S)
    for dpcp_text in dpcp_texts:
        f.write(dpcp_text + '\n')

##BeautifulSoup
def get_info2(url):
    r = requests.get(url,headers = headers)
    soup = BeautifulSoup(r.content,"lxml")
    infos = soup.select("div.read_chapterDetail p")
    for info in infos:
        dpcq_text = info.text
        f.write(dpcp_text + '\n')
    

if __name__ == "__main__":
    url_list = get_url()
    f = open("F:/doupo.txt",'a+')
    for url in url_list:
        get_info(url)
        time.sleep(1)
    f.close()

部分结果为：

天才一秒记住本站网站 www.doupoxs.com 中间是<span style="color:blue">斗破 拼音+小说 首字母</span> 连起来就是斗破小说，喜欢我就记住我吧！
第一章陨落的天才
&ldquo;斗之力，三段!&rdquo;
望着测验魔石碑上面闪亮得甚至有些刺眼的五个大字，少年面无表情，唇角有着一抹自嘲，紧握的手掌，因为大力，而导致略微尖锐的指甲深深的刺进了掌心之中，带来一阵阵钻心的疼痛&hellip;
&ldquo;萧炎，斗之力，三段!级别：低级!&rdquo;测验魔石碑之旁，一位中年男子，看了一眼碑上所显示出来的信息，语气漠然的将之公布了出来&hellip;
中年男子话刚刚脱口，便是不出意外的在人头汹涌的广场上带起了一阵嘲讽的骚动。
&ldquo;三段?嘿嘿，果然不出我所料，这个&ldquo;天才&rdquo;这一年又是在原地踏步!&rdquo;
&ldquo;哎，这废物真是把家族的脸都给丢光了。&rdquo;
&ldquo;要不是族长是他的父亲，这种废物，早就被驱赶出家族，任其自生自灭了，哪还有机会待在家族中白吃白喝。&rdquo;

任务2

爬取网址：https://www.qiushibaike.com/text/
爬取内容：用户ID、用户等级、用户性别、发表段子文字信息、好笑数量、评价数量
爬取方式：正则表达式 & BeautifulSoup（get_info2(url)，选用）

import requests
from bs4 import BeautifulSoup
import re
import time


def get_sex(sex_info):
    if sex_info == "manIcon":
        return "男"
    else:
        return "女"

##正则表达式
def get_info(url):
    headers = {'user-agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3294.6 Safari/537.36'}
    r = requests.get(url, headers = headers)
    print(r.status_code)
    #infos = soup.select("div.article")
    ids = re.findall("<h2>(.*?)</h2>",r.text,re.S)
    try:
        levels = re.findall('<div class="articleGender .*?">(.*?)</div>',r.text,re.S)
        sex_infos = re.findall('<div class="articleGender (.*?)"',r.text,re.S)
    except:
        levels = '未知'
        sex_infos = '未知'
        
    contents = re.findall('<div class="content">.*?<span>(.*?)</span>',r.text,re.S)
    laughs = re.findall('<span class="stats-vote">.*?<i class="number">(.*?)</i>',r.text,re.S)
    comments = re.findall('<span class="stats-comments">.*?<i class="number">(.*?)</i>',r.text,re.S)
    for id,level,sex_info,content,laugh,comment in zip(ids,levels,sex_infos,contents,laughs,comments):
        info = {
            'id':id,
            'level':level,
            'sex':get_sex(sex_info),
            'content':content,
            'laugh':laugh,
            'comment':comment            
            }
        info_lists.append(info)
        #print(info)
    for info_list in info_lists:
        try:
            f.write(info_list['id']+'\n')
            f.write(info_list['level']+'\n')
            f.write(info_list['sex']+'\n')
            f.write(info_list['content']+'\n')
            f.write(info_list['laugh']+'\n')
            f.write(info_list['comment']+'\n\n')
        except UnicodeEncodeError:        ##写入txt文件时去掉错误编码。如果仅打印内容不需要此语句
            pass

##BeautifulSoup
def get_info2(url):
    headers = {'user-agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3294.6 Safari/537.36'}
    r = requests.get(url, headers = headers)
    print(r.status_code)
    soup = BeautifulSoup(r.text,"lxml")
    infos = soup.select("div.article")
    for info in infos:
        id = info.select("h2")[0].text.strip()
        try:
            level = info.select("div.articleGender")[0].text
            sex_info = info.select("div.articleGender")[0].get("class")[1]
            if sex_info == "womenIcon":
                sex = "女"
            elif sex_info == "manIcon":
                sex = "男"        
        except:
            level = ""
            sex = "未知"
        content = info.select("div.content")[0].text.strip().replace('\u200b','').replace('\xba','')
        laugh = info.select("span.stats-vote i")[0].text
        comment = info.select("span.stats-comments i")[0].text.replace('\u2718','')
        f.write(id +' '+ level +' '+ sex +' '+ content +' '+ laugh +' '+ comment+'\n')
        #print(id,level,sex,content,laugh,comment)

if __name__ == "__main__":
    url_list = ["https://www.qiushibaike.com/text/page/{}/".format(i) for i in range(1,14)]
    info_lists = []
    f = open("F:/qiushibaike.txt",'a+')
    for url in url_list:
        get_info(url)
        time.sleep(1)
    f.close()