本篇內容主要講解“如何使用python 批量下載圖片”,感興趣的朋友不妨來看看。本文介紹的方法操作簡單快捷,實用性強。下面就讓小編來帶大家學習“如何使用python 批量下載圖片”吧!
from time import time from threading import Thread import requests class 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(): # 通過requests模塊的get函數獲取網絡資源 resp = requests.get( 'http://api.tianapi.com/meinv/?key=keyvalue4&num=10') # 將服務器返回的JSON格式的數據解析為字典 data_model = resp.json() for mm_dict in data_model['newslist']: url = mm_dict['picUrl'] # 通過多線程的方式實現圖片下載 DownloadHanlder(url).start() if __name__ == '__main__': main()
線程模塊提供了Thread類來處理線程,Thread類提供了以下方法: run(): 用以表示線程活動的方法。 start():啟動線程活動。
其中,Thread類中含有方法start() 其定義如下:
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,相信大家對“如何使用python 批量下載圖片”有了更深的了解,不妨來實際操作一番吧!這里是億速云網站,更多相關內容可以進入相關頻道進行查詢,關注我們,繼續學習!
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