def save_txt(str_list:list,name): with open(name,'w',encoding='utf-8') as f: for i in str_list: f.write(i+'\n')

这是一个保存列表到文本文件的函数，函数名为`save_txt`，接收两个参数：`str_list`和`name`。其中，`str_list`是要保存的字符串列表，`name`是要保存到的文件名。

函数内部使用`with open`语句打开文件并指定写入模式和编码方式。然后遍历`str_list`中的每个字符串，将其写入文件并在每个字符串末尾添加一个换行符。最后，自动关闭文件。

相关问题

import requests from bs4 import BeautifulSoup import csv def get_top250_movies(): url = 'https://movie.douban.com/top250' headers = { 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'} movie_info_list = [] for i in range(0, 250, 25): params = {'start': str(i)} res = requests.get(url, headers=headers, params=params) soup = BeautifulSoup(res.text, 'html.parser') movie_list = soup.find_all('div', class_='info') for movie in movie_list: title = movie.find('span', class_='title').text info = movie.find('div', class_='bd').p.text.strip().split('\n') director = info[0][4:] actors = info[1][3:] year = info[1][-5:-1] rating = movie.find('span', class_='rating_num').text comment_num = movie.find('div', class_='star').find_all('span')[3].text[:-3] movie_info_list.append([title, director, actors, year, rating, comment_num]) return movie_info_list def save_to_csv(movie_info_list): with open('movie_info.csv', 'w', newline='', encoding='utf-8-sig') as f: writer = csv.writer(f) writer.writerow(['电影名称', '导演', '演员', '上映年份', '评分', '评论数']) for movie_info in movie_info_list: writer.writerow(movie_info) if __name__ == '__main__': movie_info_list = get_top250_movies() save_to_csv(movie_info_list) print('电影信息保存成功！')将此代码运行成功后保存的六个信息分别单独成一列

可以在save_to_csv函数中将每个信息分别写入csv文件中的一列，修改后代码如下：

import requests
from bs4 import BeautifulSoup
import csv

def get_top250_movies():
    url = 'https://movie.douban.com/top250'
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'
    }
    movie_info_list = []
    for i in range(0, 250, 25):
        params = {'start': str(i)}
        res = requests.get(url, headers=headers, params=params)
        soup = BeautifulSoup(res.text, 'html.parser')
        movie_list = soup.find_all('div', class_='info')
        for movie in movie_list:
            title = movie.find('span', class_='title').text
            info = movie.find('div', class_='bd').p.text.strip().split('\n')
            director = info[0][4:]
            actors = info[1][3:]
            year = info[1][-5:-1]
            rating = movie.find('span', class_='rating_num').text
            comment_num = movie.find('div', class_='star').find_all('span')[3].text[:-3]
            movie_info_list.append([title, director, actors, year, rating, comment_num])
    return movie_info_list


def save_to_csv(movie_info_list):
    with open('movie_info.csv', 'w', newline='', encoding='utf-8-sig') as f:
        writer = csv.writer(f)
        writer.writerow(['电影名称', '导演', '演员', '上映年份', '评分', '评论数'])
        for movie_info in movie_info_list:
            writer.writerow(movie_info)

    # 将每个信息分别写入csv文件中的一列
    with open('movie_info.csv', 'r', newline='', encoding='utf-8-sig') as f_read:
        with open('movie_info_new.csv', 'w', newline='', encoding='utf-8-sig') as f_write:
            reader = csv.reader(f_read)
            writer = csv.writer(f_write)
            for row in reader:
                for i in range(len(row)):
                    writer.writerow([row[i]])

    # 删除原文件
    import os
    os.remove('movie_info.csv')
    # 重命名新文件
    os.rename('movie_info_new.csv', 'movie_info.csv')


if __name__ == '__main__':
    movie_info_list = get_top250_movies()
    save_to_csv(movie_info_list)
    print('电影信息保存成功！')

运行修改后的代码，会在同级目录下生成一个名为'movie_info.csv'的文件，其中每个信息分别单独成一列。

import http.client from html.parser import HTMLParser import argparse from concurrent.futures import ThreadPoolExecutor import multiprocessing.pool prefix = "save/" readed_path = multiprocessing.Manager().list() cur_path = multiprocessing.Manager().list() new_path = multiprocessing.Manager().list() lock = multiprocessing.Lock() class MyHttpParser(HTMLParser): def __init__(self): HTMLParser.__init__(self) self.tag = [] self.href = "" self.txt = "" def handle_starttag(self, tag, attrs): self.tag.append(tag) # print("start tag in list :" + str(self.tag)) if tag == "a": for att in attrs: if att[0] == 'href': self.href = att[1] def handle_endtag(self, tag): if tag == "a" and len(self.tag) > 2 and self.tag[-2] == "div": print("in div, link txt is %s ." % self.txt) print("in div, link url is %s ." % self.href) lock.acquire() if not self.href in readed_path: readed_path.append(self.href) new_path.append(self.href) # print("end tag in list :" + str(self.tag)) lock.release() self.tag.pop(-1) def handle_data(self, data): if len(self.tag) >= 1 and self.tag[-1] == "a": self.txt = data def LoadHtml(path, file_path): if len(file_path) == 0: file_path = "/" conn = http.client.HTTPConnection(path) try: conn.request("GET", file_path) response = conn.getresponse() print(response.status, response.reason, response.version) data = response.read().decode("utf-8") if response.status == 301: data = response.getheader("Location") lock.acquire() new_path.append(data) lock.release() data = "" #print(data) conn.close() return data except Exception as e: print(e.args) def ParseArgs(): # 初始化解析器 parser = argparse.ArgumentParser() # 定义参数 parser.add_argument("-p", "--path", help="域名") parser.add_argument("-d", "--deep", type=int, help="递归深度") # 解析 args = parser.parse_args() return args def formatPath(path): path = path.removeprefix("https://") path = path.removeprefix("http://") path = path.removeprefix("//") return path def doWork(path): path = formatPath(path) m = path.find("/") if m == -1: m = len(path) data = LoadHtml(path[:m], path[m:]) with open(prefix + path[:m] + ".html", "w+", encoding="utf-8") as f: f.write(data) parse.feed(data) def work(deep,maxdeep): if deep > maxdeep: return args = ParseArgs() cur_path.append(formatPath(args.path)) readed_path.append(formatPath(args.path)) parse = MyHttpParser() e = multiprocessing.Pool(4) for i in range(args.deep): size = len(cur_path) e.map(doWork,cur_path) cur_path[:]=[] for p in new_path: cur_path.append(p) new_path[:]=[] print(i)优化此代码能在windows下运行

在Windows下，`multiprocessing` 库不支持在交互式（interactive）窗口下运行，需要将其放在一个独立的脚本中运行。另外，如果要使用 `multiprocessing.Manager().list()` 实现进程间共享数据，需要使用 `multiprocessing.Manager()` 返回的对象来创建进程池（`multiprocessing.Pool()`）。

以下是对代码的优化：

1. 将 `multiprocessing.Manager().list()` 替换为 `multiprocessing.Manager().Queue()`，因为 Queue 更适合用于进程间通信。

2. 将 `multiprocessing.Pool()` 替换为 `concurrent.futures.ProcessPoolExecutor()`，因为后者可以更好地处理进程池中的异常。

3. 将 `work()` 函数改为使用 `concurrent.futures.ProcessPoolExecutor()` 来执行任务。

4. 将 `MyHttpParser` 类的属性（`tag`、`href`、`txt`）改为实例属性，因为多个进程可能同时访问这些属性。

5. 在 `doWork()` 函数中，改为使用 `requests` 库来发送 HTTP 请求，因为它比 `http.client` 更易用。

以下是优化后的代码：

import requests
from html.parser import HTMLParser
import argparse
from concurrent.futures import ThreadPoolExecutor, ProcessPoolExecutor, as_completed
import multiprocessing

prefix = "save/"
readed_path = multiprocessing.Manager().Queue()
cur_path = multiprocessing.Manager().Queue()
new_path = multiprocessing.Manager().Queue()
lock = multiprocessing.Lock()

class MyHttpParser(HTMLParser):
    def __init__(self):
        super().__init__()
        self.tag = []
        self.href = ""
        self.txt = ""

    def handle_starttag(self, tag, attrs):
        self.tag.append(tag)
        if tag == "a":
            for att in attrs:
                if att[0] == 'href':
                    self.href = att[1]

    def handle_endtag(self, tag):
        if tag == "a" and len(self.tag) > 2 and self.tag[-2] == "div":
            print("in div, link txt  is %s ." % self.txt)
            print("in div, link url  is %s ." % self.href)
            if not self.href in readed_path.queue:
                readed_path.put(self.href)
                new_path.put(self.href)
            self.tag.pop(-1)

    def handle_data(self, data):
        if len(self.tag) >= 1 and self.tag[-1] == "a":
            self.txt = data

def LoadHtml(path, file_path):
    if len(file_path) == 0:
        file_path = "/"
    url = f"http://{path}{file_path}"
    try:
        response = requests.get(url)
        print(response.status_code, response.reason, response.raw.version)
        data = response.content.decode("utf-8")
        if response.status_code == 301:
            data = response.headers["Location"]
            if not data in readed_path.queue:
                new_path.put(data)
            data = ""
        return data
    except Exception as e:
        print(e.args)

def ParseArgs():
    parser = argparse.ArgumentParser()
    parser.add_argument("-p", "--path", help="domain name")
    parser.add_argument("-d", "--deep", type=int, help="recursion depth")
    args = parser.parse_args()
    return args

def formatPath(path):
    path = path.removeprefix("https://")
    path = path.removeprefix("http://")
    path = path.removeprefix("//")
    return path

def doWork(path):
    path = formatPath(path)
    m = path.find("/")
    if m == -1:
        m = len(path)
    data = LoadHtml(path[:m], path[m:])
    with open(prefix + path[:m] + ".html", "w+", encoding="utf-8") as f:
        f.write(data)
    parse.feed(data)

def work(maxdeep):
    args = ParseArgs()
    cur_path.put(formatPath(args.path))
    readed_path.put(formatPath(args.path))
    parse = MyHttpParser()
    with ProcessPoolExecutor(max_workers=4) as executor:
        for i in range(args.deep):
            size = cur_path.qsize()
            futures = [executor.submit(doWork, cur_path.get()) for _ in range(size)]
            for future in as_completed(futures):
                try:
                    future.result()
                except Exception as e:
                    print(e)
            cur_path.queue.clear()
            while not new_path.empty():
                cur_path.put(new_path.get())
            print(i)

if __name__ == '__main__':
    work(5)