chunk_file.write(chunk)

时间: 2024-01-15 07:05:30 浏览: 28
The line `chunk_file.write(chunk)` is used to write the contents of the `chunk` variable to the file `chunk_file`. The `write()` method is used to write data to a file object. In this case, it is writing the contents of the `chunk` to the file opened in binary mode. Is there anything else you would like to know or discuss about this code?
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import requests def download_video(url, filename): response = requests.get(url, stream=True) response.raise_for_status() with open(filename, 'wb') as file: for chunk in response.iter_content(chunk_size=8192): if chunk: file.write(chunk)

您好!对于您的第一个问题,我可以看出您想要下载视频。为了下载视频,您可以使用Python中的`requests`库来发送HTTP请求并获取视频内容。以下是一个示例函数`download_video`,该函数接受视频的URL和要保存的文件名作为参数,并将视频内容写入指定的文件中: ```python import requests def download_video(url, filename): response = requests.get(url, stream=True) response.raise_for_status() with open(filename, 'wb') as file: for chunk in response.iter_content(chunk_size=8192): if chunk: file.write(chunk) ``` 您可以通过调用`download_video`函数并传入视频的URL和要保存的文件名来下载视频。请注意,这个函数使用了流式传输(stream=True),这对于大型文件非常有用,因为它允许您逐块下载并保存文件,而不会一次性加载整个文件到内存中。 希望这个函数能帮到您!如果您有任何其他问题,请随时提问。

offset = 0 for chunk in f.iter_content(chunk_size=self.buffer): # 依次读取整个包 if not chunk: break self.fileobj.seek(offset) self.fileobj.write(chunk) offset = offset + len(chunk) proess = offset / int(self.filesize) * 100 # logger.info("写入块:{},{}".format(offset,proess)) self.download_proess_signal.emit(int(proess))这段代码如何理解

这段代码是用来读取文件的内容。其中,offset表示文件的偏移量,初始值为0。iter_content是一个迭代器,每次返回指定大小的文件内容块(chunk),大小由buffer参数指定。通过循环迭代,可以逐步读取整个文件的内容。

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import re,tkinter,requests,threading,tqdm as tt root = tkinter.Tk() root.title('在线视频解析') root.geometry('500x590+550+350') headers = { 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0'} ac = tkinter.Listbox(root, width=50, height=20, font=('黑体', 12)) ac.grid(row=2, columnspan=10, sticky="n" + "s" + "w" + "e") def sousuo(): i = b1.get() ac.delete(0, 'end') def extract_music_info(content): p = '|' content = re.sub(p, '', content, flags=re.S) pattern = re.compile('subject.*?href="(.*?)">(.*?)', flags=re.S) return pattern.findall(content) def search_music(): url = 'https://www.hifini.com/search-' + i + '-1.htm' response = requests.get(url=url, headers=headers) return response.text def update_listbox(music_list): for music in music_list: pppp = music[1] + ":" + music[0] ac.insert('end', pppp) content = search_music() music_list = extract_music_info(content) update_listbox(music_list) def xiazzi(): def download_music(): ppp = ac.get(ac.curselection()) pp = re.search('thread.*?htm', ppp) v = pp.group() url1 = 'https://www.hifini.com/' + v response = requests.get(url=url1, headers=headers) ppp = response.text l2 = re.search('<script>.*?title:..(.*?).,.*?author:.(.*?).,.*?url:..(.*?).,', ppp, flags=re.S) p = 'https://www.hifini.com/' + l2.group(3) response = requests.get(url=p, headers=headers, stream=True) # 设置 stream=True 以启用流式下载 total_size = int(response.headers.get('Content-Length')) music_name = '{}-{}.mp3'.format(l2.group(2), l2.group(1)) progress_bar = tt.tqdm(total=total_size, unit='B', unit_scale=True) # 创建进度条 with open(music_name, 'wb') as f: for data in response.iter_content(chunk_size=1024): progress_bar.update(len(data)) # 更新进度条 f.write(data) progress_bar.close() # 关闭进度条 print(music_name) threading.Thread(target=download_music).start() a1 = tkinter.Label(root, text='音乐下载器', anchor="center", font=('黑体', 24)) a1.grid(row=0, columnspan=10, sticky="n" + "s" + "w" + "e") b1 = tkinter.Entry(root, width=35, font=('黑体', 16), ) b1.grid(row=1, column=3, padx=15) search_button = tkinter.Button(root, text='搜索', command=sousuo) search_button.grid(row=1, column=4) download_button = tkinter.Button(root, text='下载', command=xiazzi) download_button.grid(row=3, column=4) root.mainloop() 添加 判断下载的文件是不是m4a如果就转为MP3,root上添加下载进度条

根据错误:AttributeError: module 'networkx' has no attribute 'from_numpy_matrix',修改下述代码:import os import jieba.analyse from textrank4zh import TextRank4Keyword import concurrent.futures # 定义分块读取函数 def read_in_chunks(file_path, chunk_size=1024*1024): with open(file_path, 'r', encoding='utf-8') as f: while True: data = f.read(chunk_size) if not data: break yield data # 定义处理函数 def process_chunk(chunk): # 使用jieba分词提取关键词 jieba_keywords = jieba.analyse.extract_tags(chunk, topK=10, withWeight=True) # 使用textrank4zh提取关键词 tr4w = TextRank4Keyword() tr4w.analyze(chunk, lower=True, window=2) textrank_keywords = tr4w.get_keywords(10, word_min_len=2) # 合并两种方法提取的关键词 keywords = jieba_keywords + textrank_keywords return keywords # 读取文本文件,并按块处理 chunks = [] for chunk in read_in_chunks('input.txt'): chunks.append(chunk) # 多线程并行处理 results = [] with concurrent.futures.ThreadPoolExecutor() as executor: futures = [executor.submit(process_chunk, chunk) for chunk in chunks] for future in concurrent.futures.as_completed(futures): results.extend(future.result()) # 合并结果,并按权重降序排序 keywords = {} for keyword, weight in results: if keyword in keywords: keywords[keyword] += weight else: keywords[keyword] = weight keywords = sorted(keywords.items(), key=lambda x: x[1], reverse=True) keywords = [(keyword, weight) for keyword, weight in keywords if len(keyword) > 1][:10] # 输出到txt文件中 with open('output.txt', 'w', encoding='utf-8') as f: for keyword, weight in keywords: f.write(keyword + '\t' + str(weight) + '\n')

import os import jieba.analyse from textrank4zh import TextRank4Keyword import concurrent.futures import scipy # 定义分块读取函数 def read_in_chunks(file_path, chunk_size=1024 * 1024): with open(file_path, 'r', encoding='utf-8') as f: while True: data = f.read(chunk_size) if not data: break yield data # 定义处理函数 def process_chunk(chunk): # 使用jieba分词提取关键词 jieba_keywords = jieba.analyse.extract_tags(chunk, topK=10, withWeight=True) # 使用textrank4zh提取关键词 tr4w = TextRank4Keyword() tr4w.analyze(chunk, lower=True, window=2) textrank_keywords = tr4w.get_keywords(10, word_min_len=2) # 合并两种方法提取的关键词 keywords = jieba_keywords + textrank_keywords return keywords # 读取文本文件,并按块处理 chunks = [] for chunk in read_in_chunks('cnl_201504.txt'): chunks.append(chunk) # 多线程并行处理 results = [] with concurrent.futures.ThreadPoolExecutor() as executor: futures = [executor.submit(process_chunk, chunk) for chunk in chunks] for future in concurrent.futures.as_completed(futures): results.extend(future.result()) # 合并结果,并按权重降序排序 keywords = {} for keyword, weight in results: if keyword in keywords: keywords[keyword] += weight else: keywords[keyword] = weight keywords = sorted(keywords.items(), key=lambda x: x[1], reverse=True) keywords = [(keyword, weight) for keyword, weight in keywords if len(keyword) > 1][:10] # 输出到txt文件中 with open('output.txt', 'w', encoding='utf-8') as f: for keyword, weight in keywords: f.write(keyword + '\t' + str(weight) + '\n')运行上述代码出现下述问题,请修改代码:AttributeError: module 'networkx' has no attribute 'from_numpy_matrix'

using System; using System.IO; using System.Linq; using Microsoft.AspNetCore.Http; using Microsoft.AspNetCore.Mvc; namespace FileUpload.Controllers { [ApiController] public class UploadController : ControllerBase { private const int ChunkSize = 1024 * 1024 * 1; // 每个分片的大小,这里设为1MB private const string UploadPath = "uploads"; // 文件上传目录 private static string _filePath; // 完整的文件路径 [HttpPost("/upload/start")] public ActionResult StartUpload(IFormFile file) { if (file == null || file.Length <= 0) { return BadRequest("请选择要上传的文件"); } // 生成文件名 string fileName = file.FileName; string fileExt = Path.GetExtension(fileName); string newFileName = Guid.NewGuid().ToString("N") + fileExt; // 生成文件存储目录 string dirPath = Path.Combine(Directory.GetCurrentDirectory(), UploadPath); if (!Directory.Exists(dirPath)) { Directory.CreateDirectory(dirPath); } // 生成文件路径 _filePath = Path.Combine(dirPath, newFileName); // 返回上传开始的响应 return Ok(new { FileName = newFileName, ChunkSize, }); } [HttpPost("/upload/append")] public ActionResult AppendUpload(string fileName, int chunkIndex, int chunks, IFormFile chunk) { byte[] buffer = new byte[ChunkSize]; int bytesRead = 0; int start = chunkIndex * ChunkSize; // 分片开始位置 int end = Math.Min(start + ChunkSize, (int)chunk.Length); // 分片结束位置 using (Stream stream = chunk.OpenReadStream()) { using (FileStream fileStream = new FileStream(_filePath, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Write)) { fileStream.Position = start; while ((bytesRead = stream.Read(buffer, 0, Math.Min(buffer.Length, end - start))) > 0) { fileStream.Write(buffer, 0, bytesRead); start += bytesRead; } fileStream.Flush(true); } } // 检查是否所有分片都上传成功 int[] uploadedChunks = Directory.GetFiles(Path.GetDirectoryName(_filePath), $"{Path.GetFileName(_filePath)}_*").Select(filepath => int.Parse(filepath.Split('_')[1])).ToArray(); if (uploadedChunks.Length == chunks) { // 合并分片 using (FileStream fileStream = new FileStream(_filePath, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Write)) { foreach (int index in uploadedChunks.OrderBy(i => i)) { string chunkPath = $"{_filePath}_{index}"; using (FileStream chunkStream = new FileStream(chunkPath, FileMode.Open, FileAccess.Read, FileShare.Read)) { chunkStream.CopyTo(fileStream); } System.IO.File.Delete(chunkPath); // 删除已合并的分片 } fileStream.Flush(true); } } return Ok(); } } }

帮我增加进度条import io import re import tkinter import requests import threading from pydub import AudioSegment root = tkinter.Tk() root.title('在线视频解析') root.geometry('500x590+550+350') headers = { 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0'} ac = tkinter.Listbox(root, width=50, height=20, font=('黑体', 12)) ac.grid(row=2, columnspan=10, sticky="n" + "s" + "w" + "e") def sousuo(): i = b1.get() ac.delete(0, 'end') def extract_music_info(content): p = '|' content = re.sub(p, '', content, flags=re.S) pattern = re.compile('subject.*?href="(.*?)">(.*?)', flags=re.S) return pattern.findall(content) def search_music(): url = 'https://www.hifini.com/search-' + i + '-1.htm' response = requests.get(url=url, headers=headers) return response.text def update_listbox(music_list): for music in music_list: pppp = music[1] + ":" + music[0] ac.insert('end', pppp) content = search_music() music_list = extract_music_info(content) update_listbox(music_list) def xiazzi(): def download_music(): ppp = ac.get(ac.curselection()) pp = re.search('thread.*?htm', ppp) v = pp.group() url1 = 'https://www.hifini.com/' + v response = requests.get(url=url1, headers=headers) ppp = response.text l2 = re.search('<script>.*?title:..(.*?).,.*?author:.(.*?).,.*?url:..(.*?).,', ppp, flags=re.S) p = 'https://www.hifini.com/' + l2.group(3) response = requests.get(url=p, headers=headers) l3 = response.content music_name = '{}-{}.mp3'.format(l2.group(2), l2.group(1)) if l3.startswith(b'\x00\x00\x00\x20\x66\x74\x79\x70'): audio = AudioSegment.from_file(io.BytesIO(l3), format='m4a') audio.export(music_name, format='mp3') else: with open(music_name, 'wb') as f: f.write(l3) print(music_name) threading.Thread(target=download_music).start() a1 = tkinter.Label(root, text='音乐下载器', anchor="center", font=('黑体', 24)) a1.grid(row=0, columnspan=10, sticky="n" + "s" + "w" + "e") b1 = tkinter.Entry(root, width=35, font=('黑体', 16), ) b1.grid(row=1, column=3, padx=15) search_button = tkinter.Button(root, text='搜索', command=sousuo) search_button.grid(row=1, column=4) download_button = tkinter.Button(root, text='下载', command=xiazzi) download_button.grid(row=3, column=4) root.mainloop()

for x, i, j, k, l in product(range(2, 11), range(12, 21), range(7, 11), range(2, 11), range(1, 3)): data["normalSpeed"] = i / 3.6 data["turningFarmToolCtrlSpeed"] = x / 3.6 data["minTurningRadius"] = j data["breadth"] = k data["jobType"] = l for block_type in ["小地块", "中地块", "大地块"]: if block_type == "小地块": data["map"]["outerbd"] = outerbd_small data["map"]["entrance"] = entrance_small data["map"]["exit"] = exit_small elif block_type == "中地块": data["map"]["outerbd"] = outerbd_middle data["map"]["entrance"] = entrance_middle data["map"]["exit"] = exit_middle else: data["map"]["outerbd"] = outerbd_large data["map"]["entrance"] = entrance_large data["map"]["exit"] = exit_large json_str = json.dumps(data) res = requests.post(url, json_str).text filename = os.path.join(e_path_file, f'normalSpeed={i}, turningFarmToolCtrlSpeed={x}, minTurningRadius={j}, breadth={k}, ' f'jobType={l}, {block_type}.txt') with open(filename, 'w') as file: file.write(res) print(f'写入成功,速度为{i},转弯速度为{x},转弯半径为{j},幅宽为{k},作业模式为{l},{block_type}') logger.info(f'写入成功,速度为{i},转弯速度为{x},转弯半径为{j},幅宽为{k},作业模式为{l},{block_type}') if block_type == "小地块": time.sleep(5) plot_route_from_file(filename, f'normalSpeed={i}, turningFarmToolCtrlSpeed={x}, minTurningRadius={j}, breadth={k}, ' f'jobType={l}, {block_type}', error_flag, success_flag, outerbd_small) elif block_type == "中地块": time.sleep(10) plot_route_from_file(filename, f'normalSpeed={i}, turningFarmToolCtrlSpeed={x}, minTurningRadius={j}, breadth={k}, ' f'jobType={l}, {block_type}', error_flag, success_flag, outerbd_middle) else: time.sleep(15) plot_route_from_file(filename, f'normalSpeed={i}, turningFarmToolCtrlSpeed={x}, minTurningRadius={j}, breadth={k}, ' f'jobType={l}, {block_type}', error_flag, success_flag, outerbd_large) 这样发送post请求有时候会报错requests.exceptions.ConnectionError: ('Connection aborted.', LineTooLong('got more than 65536 bytes when reading status line'))。这是为什么,怎么解决

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