1.安装requests:
pip install requests
2.实例：
# # encoding:utf-8 import requests import os import time def get_local_file_exists_size(local_path): try: lsize = os.stat(local_path).st_size except: lsize = 0 return lsize def get_file_obj(down_link, offset): webPage = None try: headers = {'Range': 'bytes=%d-' % offset} webPage = requests.get(down_link, stream=True, headers=headers, timeout=120, verify=False) status_code = webPage.status_code if status_code in [200, 206]: webPage = webPage elif status_code == 416: print u"%s文件数据请求区间错误,status_code:%s" % (down_link, status_code) else: print u"%s链接有误,status_code:%s" % (down_link, status_code) except Exception as e: print u"无法链接:%s,e:%s" % (down_link, e) finally: return webPage down_link = '' #下载链接 file_size = 271768736 #文件总大小 local_path = "/home/adger/image/test.mp4" while True: lsize = get_local_file_exists_size(local_path) if lsize == file_size: break webPage = get_file_obj(down_link, lsize) try: file_obj = open(local_path, 'ab+') except Exception as e: print u"打开文件:%s失败" % local_path break try: for chunk in webPage.iter_content(chunk_size=64 * 1024): if chunk: file_obj.write(chunk) else: break except Exception as e: time.sleep(5) file_obj.close() webPage.close()