Python HTTP下载文件并显示下载进度条
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下面的Python脚本中利用request下载文件并写入到文件系统,利用progressbar模块显示下载进度条。
其中利用request模块下载文件可以直接下载,不需要使用open方法,例如:
import urllib import requests.packages.urllib3 requests.packages.urllib3.disable_warnings() url = "https://raw.githubusercontent.com/racaljk/hosts/master/hosts" urllib.urlretrieve(url, filename="hosts")
下面的例子是题目中完整的例子,其中注释的部分是进度条的另一种写法,显示当前处理过的行数。
#!/usr/bin/python # encoding: utf-8 # -*- coding: utf8 -*- """ Created by PyCharm. File: LinuxBashShellScriptForOps:download_file2.py User: Guodong Create Date: 2016/9/14 Create Time: 9:40 """ import requests import progressbar import requests.packages.urllib3 requests.packages.urllib3.disable_warnings() url = "https://raw.githubusercontent.com/racaljk/hosts/master/hosts" response = requests.request("GET", url, stream=True, data=None, headers=None) save_path = "/tmp/hosts" total_length = int(response.headers.get("Content-Length")) with open(save_path, ‘wb‘) as f: # widgets = [‘Processed: ‘, progressbar.Counter(), ‘ lines (‘, progressbar.Timer(), ‘)‘] # pbar = progressbar.ProgressBar(widgets=widgets) # for chunk in pbar((i for i in response.iter_content(chunk_size=1))): # if chunk: # f.write(chunk) # f.flush() widgets = [‘Progress: ‘, progressbar.Percentage(), ‘ ‘, progressbar.Bar(marker=‘#‘, left=‘[‘, right=‘]‘), ‘ ‘, progressbar.ETA(), ‘ ‘, progressbar.FileTransferSpeed()] pbar = progressbar.ProgressBar(widgets=widgets, maxval=total_length).start() for chunk in response.iter_content(chunk_size=1): if chunk: f.write(chunk) f.flush() pbar.update(len(chunk) + 1) pbar.finish()
运行结果:
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