如何使用python 批量下载图片

本篇内容主要讲解"如何使用python 批量下载图片"，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习"如何使用python 批量下载图片"吧!

from time import timefrom threading import Threadimport requestsclass DownloadHanlder(Thread):    def __init__(self, url):        super().__init__()        self.url = url    def run(self):        filename = self.url[self.url.rfind('/') + 1:]        #get the filename from origin url with the value of :        # 'https://cache.yisu.com/upload/information/20210521/347/345442.jpg'        resp = requests.get(self.url)        with open('./pictest/' + filename, 'wb') as f:            f.write(resp.content)def main():    # 通过requests模块的get函数获取网络资源    resp = requests.get(        'http://api.tianapi.com/meinv/?key=keyvalue4&num=10')    # 将服务器返回的JSON格式的数据解析为字典    data_model = resp.json()    for mm_dict in data_model['newslist']:        url = mm_dict['picUrl']        # 通过多线程的方式实现图片下载        DownloadHanlder(url).start()if __name__ == '__main__':    main()

线程模块提供了Thread类来处理线程，Thread类提供了以下方法: run(): 用以表示线程活动的方法。 start():启动线程活动。

其中，Thread类中含有方法start() 其定义如下：

    def start(self):        """Start the thread's activity.        It must be called at most once per thread object. It arranges for the        object's run() method to be invoked in a separate thread of control.        This method will raise a RuntimeError if called more than once on the        same thread object.        """        if not self._initialized:            raise RuntimeError("thread.__init__() not called")        if self._started.is_set():            raise RuntimeError("threads can only be started once")        with _active_limbo_lock:            _limbo[self] = self        try:            _start_new_thread(self._bootstrap, ())        except Exception:            with _active_limbo_lock:                del _limbo[self]            raise        self._started.wait()

到此，相信大家对"如何使用python 批量下载图片"有了更深的了解，不妨来实际操作一番吧！这里是网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！