利用python的requests爬取高清壁纸

明确爬取图片步骤

1. 确定网站的user-agent

进入网站右键点击 检查，可看到如下界面：

点击小wifi图标，最下面的user-agent即设为headers

 2.  查看网站源码

找出图片所对应的代码块

 即对应一个div列表，此时发现高清图地址位于a标签的href属性值中，所以需获取高清图地址 

继而在高清图页面进行源码分析

 发现地址位于a标签的href的属性中，所以我们利用xpath提取出高清图地址后在该页面进行xpath操作获取下载地址即可保存图片。

源码如下：

import requests
import os
from lxml import etree

headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.81 Safari/537.36 Edg/104.0.1293.47'}


def di_zhi():
    list_suo = []
    for i in range(1, 11):
        if i > 1:
            url = f'https://wall.alphacoders.com/by_sub_category.php?id=306566&name=%E5%A4%A7%E4%BE%A6%E6%8E%A2%E7%9A%AE%E5%8D%A1%E4%B8%98+%E5%A3%81%E7%BA%B8&filter=4K+Ultra+HD&lang=Chinese/index_{i}.html'
        else:
            url = 'https://wall.alphacoders.com/by_sub_category.php?id=306566&name=%E5%A4%A7%E4%BE%A6%E6%8E%A2%E7%9A%AE%E5%8D%A1%E4%B8%98+%E5%A3%81%E7%BA%B8&filter=4K+Ultra+HD&lang=Chinese/index.html'
        response_text = requests.get(url, headers=headers, timeout=30).text

        tree = etree.HTML(response_text)
        # 提取出高清图所在页面地址
        r = tree.xpath('//div[@]/div/div/div/a/@href')
        for j in r:
            list_suo.append(j)
        # print(list_suo)
    return list_suo


def gao_qing(kang):
    img_name = 0
    if not os.path.exists('./pikapi'):
        os.mkdir('./pikapi')
    for i in kang:
        url = "https://wall.alphacoders.com" + i
        response = requests.get(url=url, headers=headers, timeout=15)
        response.encoding = 'gbk'
        response_text = response.text

        tree = etree.HTML(response_text)
        img_src = tree.xpath('//div[@]/a/@href')[0]
        #print(img_src)
        #print(img_name)
        # 获取图片二进制数据
        img_content = requests.get(img_src, headers=headers, timeout=30).content
        img_path = './pikapi/' + str(img_name) + '.jpg'
        with open(img_path, 'wb') as f:
            f.write(img_content)
        print(img_src + str(img_name) + '.jpg下载完毕')
        #print(img_name)
        img_name = img_name + 1
    print("pikapi全部下载完毕！")


def main():
    k = di_zhi()
    gao_qing(k)


if __name__ == '__main__':
    main()

 之前爬取的时候出现了由于爬取过快而被禁掉IP的问题，所以在这把 timeout调大一点

可见图片已经保存在指定的目录下咯 

我发现之前爬的网站页面照片只有二十张（这样会有重复），所以换个页面爬取（方法和之前一样）：

import requests
import os
from lxml import etree

headers = {'User-Agent': 'https://wall.alphacoders.com/by_collection.php?id=81&lang=Chinese'}


def di_zhi():
    list_suo = []
    for i in range(1, 11):
        if i > 1:
            url = f'https://wall.alphacoders.com/by_collection.php?id=81&lang=Chinese/index_{i}.html'
        else:
            url = 'https://wall.alphacoders.com/by_collection.php?id=81&lang=Chinese/index.html'
        response_text = requests.get(url, headers=headers, timeout=30).text

        tree = etree.HTML(response_text)
        # 提取出高清图所在页面地址
        r = tree.xpath('//div[@]/div/div/div/a/@href')
        for j in r:
            list_suo.append(j)
        # print(list_suo)
    return list_suo


def gao_qing(kang):
    img_name = 0
    if not os.path.exists('./pikapi2'):
        os.mkdir('./pikapi2')
    for i in kang:
        url = "https://wall.alphacoders.com" + i
        response = requests.get(url=url, headers=headers, timeout=15)
        response.encoding = 'gbk'
        response_text = response.text

        tree = etree.HTML(response_text)
        img_src = tree.xpath('//div[@]/a/@href')[0]
        #print(img_src)
        #print(img_name)
        # 获取图片二进制数据
        img_content = requests.get(img_src, headers=headers, timeout=30).content
        img_path = './pikapi2/' + str(img_name) + '.jpg'
        with open(img_path, 'wb') as f:
            f.write(img_content)
        print(img_src + str(img_name) + '.jpg下载完毕')
        #print(img_name)
        img_name = img_name + 1
    print("pikapi全部下载完毕！")


def main():
    k = di_zhi()
    gao_qing(k)


if __name__ == '__main__':
    main()

不得不说，皮神是真的可爱