Python第三周之檔案的讀寫以及簡單的爬蟲介紹

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檔案的讀寫

　　讀

import timedef main():    """    檔案的讀寫，注意open的用法以及，檔案地址的輸入。    :return:     """    temp = open(‘abcd/hello.txt‘, ‘r‘, encoding=‘utf-8‘)     contents = temp.readlines()    for content in contents:        print(content)        time.sleep(1)
　　temp.close()if __name__ == ‘__main__‘:    main()

　　寫

def main():    try:        with open(‘abcd/hello.txt‘, ‘w‘, encoding=‘utf-8‘) as fs:            fs.write(‘奧尼‘)    except FileNotFoundError:        print(‘無法開啟‘)    except IOError as e:        print(e)if __name__ == ‘__main__‘:    main()

讀和寫

def main():    try:        with open(‘abcd/a.jpg‘, ‘rb‘) as fs1:            date = fs1.read()        with open(‘efg/b.jpg‘, ‘wb‘) as fs2:            fs2.write(date)    except FileNotFoundError:        print(‘無法開啟‘)    except IOError:        print(‘讀寫錯誤‘)    print(‘程式執行結束‘)if __name__ == ‘__main__‘:    main()

耙梳絡上的圖片

import jsonimport requestsdef main():    resp = requests.get(‘http://api.tianapi.com/nba/?key=81085f5747a59581327b29d1bccfb925&num=10‘)    mydict = json.loads(resp.text)    print(mydict)    for tempdict in mydict[‘newslist‘]:        pic_url = tempdict[‘picUrl‘]        resp = requests.get(pic_url)        filename = pic_url[pic_url.rfind(‘/‘) + 1:]        try:            with open(filename, ‘wb‘) as fs:                fs.write(resp.content)        except IOError as e:            print(e)if __name__ == ‘__main__‘:    main()

 

Python第三周之檔案的讀寫以及簡單的爬蟲介紹