python实践项目（十一）

分手后的思念是犯贱 2022-06-02 06:23 299阅读 0赞

1、从图像网站下载

编写一个程序，访问图像共享网站，如 Flickr 或 Imgur，查找一个类型的照片，然后下载所有查询结果的图像。可以编写一个程序，访问任何具有查找功能的图像网站。

#-*-coding:utf-8-*-
    import os
    import requests
    import bs4
    
    baseUrl = 'http://imgur.com'
    dirName = 'image'
    os.makedirs(dirName, exist_ok=True)
    # 搜索参数
    url = baseUrl + '/search/score?q=' + 'movie'
    response = requests.get(url)
    response.raise_for_status()
    soup = bs4.BeautifulSoup(response.text, "html.parser")
    imageUrls = soup.select(".image-list-link img")
    if not imageUrls:
        print('Could not find image.')
    else:
        for imageUrl in imageUrls:
            downloadUrl = imageUrl.get('src')
            print("Download image %s..." % downloadUrl)
            split = downloadUrl.split('/')
            fileName = os.path.basename(split[len(split) - 1])
            filePath = os.path.join(dirName, fileName)
            print("FilePath is  %s..." % filePath)
            if not os.path.exists(filePath):
                imageStream = requests.get('http:' + downloadUrl)
                imageStream.raise_for_status()
                imageFile = open(filePath, 'wb')
                for chunk in imageStream.iter_content(100000):
                    imageFile.write(chunk)

2、2048游戏

2048 是一个简单的游戏，通过箭头向上、下、左、右移动滑块，让滑块合并。实际上，你可以通过一遍一遍的重复“上、右、下、左”模式，获得相当高的分数。编写一个程序，打开 https://gabrielecirulli.github.io/2048/上的游戏，不断发送上、右、下、左按键，自动玩游戏。

#-*-coding:utf-8-*-
    from selenium import webdriver
    from selenium.webdriver.common.keys import Keys
    
    browser = webdriver.Firefox()
    url = 'https://gabrielecirulli.github.io/2048/'
    browser.get(url)
    game_elem = browser.find_element_by_class_name('game-container')
    while True:
        retry_elem = browser.find_element_by_class_name('retry-button')
        # new game
        if retry_elem.text == 'Try again':
            retry_elem.click()
            game_elem = browser.find_element_by_class_name('game-container')
        game_elem.send_keys(Keys.UP)
        game_elem.send_keys(Keys.RIGHT)
        game_elem.send_keys(Keys.DOWN)
        game_elem.send_keys(Keys.LEFT)

3、链接验证

编写一个程序，对给定的网页 URL，下载该页面所有链接的页面。程序应该标记出所有具有 404“Not Found”状态码的页面，将它们作为坏链接输出。

#-*-coding:utf-8-*-
    import requests
    import bs4
    
    url = 'http://ifeve.com/'
    response = requests.get(url)
    soup = bs4.BeautifulSoup(response.text, "html.parser")
    a_list = soup.select('a')
    for a in a_list:
        a_url = a.get('href')
        try:
            response = requests.get(a_url)
            if response.status_code == requests.codes.not_found:
                print("Page %s is broken link" % a_url)
            else:
                print("Page %s is other type link" % a_url)
            response.raise_for_status()
        except:
            print("Page %s is Error" % a_url)