Python3 requests文件下载 期间显示文件信息和下载进度代码实例

"""使用模块线程方式实现网络资源的下载# 实现文件下载, 期间显示文件信息&下载进度# 控制台运行以显示进度"""import requestsimport os.path as opimport osfrom sys import stdoutdef downloadfile(url, filename):  """下载文件并显示过程  :param url: 资源地址  :param filename: 保存的名字, 保存在当前目录  """  # print(url)  filename = filename + '.' + op.splitext(url)[-1]  file_to_save = op.join(os.getcwd(), filename)  # print(file_to_save)  with open(file_to_save, "wb") as fw:    with requests.get(url, stream=True) as r:      # 此时只有响应头被下载      # print(r.headers)      print("下载文件基本信息:")      print('-' * 30)      print("文件名称:", filename)      print("文件类型:", r.headers["Content-Type"])      filesize = r.headers["Content-Length"]      print("文件大小:", filesize, "bytes")      print("下载地址:", url)      print("保存路径:", file_to_save)      print('-' * 30)      print("开始下载")      chunk_size = 128      times = int(filesize) // chunk_size      show = 1 / times      show2 = 1 / times      start = 1      for chunk in r.iter_content(chunk_size):        fw.write(chunk)        if start <= times:          stdout.write(f"下载进度: {show:.2%}/r")          start += 1          show += show2        else:          stdout.write("下载进度: 100%")      print("/n结束下载")if __name__ == "__main__":  downloadfile("https://code.jquery.com/jquery-3.4.1.js", "a")