概述
<p class="title">一、引入
这段时间一直在学习Python的东西,以前就听说Python爬虫多厉害,正好现在学到这里,跟着小甲鱼的Python视频写了一个爬虫程序,能实现简单的网页图片下载。
代码
import urllib.request
import os
import random
import redef url_open(url):
'''
打开网页
:param url:
:return:
'''
req = urllib.request.Request(url)
req.add_header('User-Agent','Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML,like Gecko) Chrome/49.0.2623.75 Safari/537.36')# 应用代理 ''' proxyies = ["111.155.116.237:8123","101.236.23.202:8866","122.114.31.177:808"] proxy = random.choice(proxyies) proxy_support = urllib.request.ProxyHandler({"http": proxy}) opener = urllib.request.build_opener(proxy_support) urllib.request.install_opener(opener) ''' response = urllib.request.urlopen(url) html = response.read() return html
def save_img(folder,img_addrs):
'''
保存图片
:param folder: 要保存的文件夹
:param img_addrs: 图片地址(列表)
:return:
'''创建文件夹用来存放图片
if not <a href="https://www.jb51.cc/tag/ospath/" target="_blank" class="keywords">os.path</a>.exists(folder): os.mkdir(folder) os.chdir(folder) for each in img_addrs: filename = each.split('/')[-1] try: with open(filename,'wb') as f: img = url_open("http:" + each) f.write(img) except urllib.error.HTTPError as e: # print(e.reason) pass print('完毕!')
def find_imgs(url):
'''
获取全部的图片链接
:param url: 连接地址
:return: 图片地址的列表
'''
html = url_open(url).decode("utf-8")
img_addrs = re.findall(r'src="(.+?.gif)',html)
return img_addrsdef get_page(url):
'''
获取当前一共有多少页的图片
:param url: 网页地址
:return:
'''
html = url_open(url).decode('utf-8')
a = html.find("current-comment-page") + 23
b = html.find("]",a)return html[a:b]
def download_mm(url="http://jandan.net/ooxx/",folder="OOXX",pages=1):
'''
主程序(下载图片)
:param folder:默认存放的文件夹
:param pages: 下载的页数
:return:
'''
page_num = int(get_page(url))for i in range(pages): page_num -= i page_url = url + "page-" + str(page_num) + "#comments" img_addrs = find_imgs(page_url) save_img(folder,img_addrs)
if name == "main":
download_mm()
# 应用代理
'''
proxyies = ["111.155.116.237:8123","101.236.23.202:8866","122.114.31.177:808"]
proxy = random.choice(proxyies)
proxy_support = urllib.request.ProxyHandler({"http": proxy})
opener = urllib.request.build_opener(proxy_support)
urllib.request.install_opener(opener)
'''
response = urllib.request.urlopen(url)
html = response.read()
return html
if not <a href="https://www.jb51.cc/tag/ospath/" target="_blank" class="keywords">os.path</a>.exists(folder):
os.mkdir(folder)
os.chdir(folder)
for each in img_addrs:
filename = each.split('/')[-1]
try:
with open(filename,'wb') as f:
img = url_open("http:" + each)
f.write(img)
except urllib.error.HTTPError as e:
# print(e.reason)
pass
print('完毕!')
return html[a:b]
for i in range(pages):
page_num -= i
page_url = url + "page-" + str(page_num) + "#comments"
img_addrs = find_imgs(page_url)
save_img(folder,img_addrs)
def url_open(url):
'''
打开网页
:param url:
:return:
'''
req = urllib.request.Request(url)
req.add_header('User-Agent','Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML,like Gecko) Chrome/49.0.2623.75 Safari/537.36')
def save_img(folder,img_addrs):
'''
保存图片
:param folder: 要保存的文件夹
:param img_addrs: 图片地址(列表)
:return:
'''
def find_imgs(url):
'''
获取全部的图片链接
:param url: 连接地址
:return: 图片地址的列表
'''
html = url_open(url).decode("utf-8")
img_addrs = re.findall(r'src="(.+?.gif)',html)
return img_addrs
def get_page(url):
'''
获取当前一共有多少页的图片
:param url: 网页地址
:return:
'''
html = url_open(url).decode('utf-8')
a = html.find("current-comment-page") + 23
b = html.find("]",a)
def download_mm(url="http://jandan.net/ooxx/",folder="OOXX",pages=1):
'''
主程序(下载图片)
:param folder:默认存放的文件夹
:param pages: 下载的页数
:return:
'''
page_num = int(get_page(url))
if name == "main":
download_mm()
def url_open(url):
'''
打开网页
:param url:
:return:
'''
req = urllib.request.Request(url)
req.add_header('User-Agent','Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML,like Gecko) Chrome/49.0.2623.75 Safari/537.36')
# 应用代理
'''
proxyies = ["111.155.116.237:8123","101.236.23.202:8866","122.114.31.177:808"]
proxy = random.choice(proxyies)
proxy_support = urllib.request.ProxyHandler({"http": proxy})
opener = urllib.request.build_opener(proxy_support)
urllib.request.install_opener(opener)
'''
response = urllib.request.urlopen(url)
html = response.read()
return html
def save_img(folder,img_addrs):
'''
保存图片
:param folder: 要保存的文件夹
:param img_addrs: 图片地址(列表)
:return:
'''
if not <a href="https://www.jb51.cc/tag/ospath/" target="_blank" class="keywords">os.path</a>.exists(folder):
os.mkdir(folder)
os.chdir(folder)
for each in img_addrs:
filename = each.split('/')[-1]
try:
with open(filename,'wb') as f:
img = url_open("http:" + each)
f.write(img)
except urllib.error.HTTPError as e:
# print(e.reason)
pass
print('完毕!')
def find_imgs(url):
'''
获取全部的图片链接
:param url: 连接地址
:return: 图片地址的列表
'''
html = url_open(url).decode("utf-8")
img_addrs = re.findall(r'src="(.+?.gif)',html)
return img_addrs
def get_page(url):
'''
获取当前一共有多少页的图片
:param url: 网页地址
:return:
'''
html = url_open(url).decode('utf-8')
a = html.find("current-comment-page") + 23
b = html.find("]",a)
return html[a:b]
def download_mm(url="http://jandan.net/ooxx/",folder="OOXX",pages=1):
'''
主程序(下载图片)
:param folder:默认存放的文件夹
:param pages: 下载的页数
:return:
'''
page_num = int(get_page(url))
for i in range(pages):
page_num -= i
page_url = url + "page-" + str(page_num) + "#comments"
img_addrs = find_imgs(page_url)
save_img(folder,img_addrs)
if name == "main":
download_mm()
由于代码中访问的网址已经运用了反爬虫的算法。所以已经爬不到想要的图片啦,so,就当是记了个爬虫的笔记吧。仅供学习参考[捂脸]。。。。
最后:我把jpg格式换成gif,还能爬到可怜的一张gif图:
总结
以上是编程之家为你收集整理的Python爬虫之网页图片抓取全部内容,希望文章能够帮你解决Python爬虫之网页图片抓取所遇到的程序开发问题。
如果您也喜欢它,动动您的小指点个赞吧