python爬虫爬取网页里面特定的图片
时间: 2024-09-10 08:12:13 浏览: 57
在Python中,爬取网页上特定图片通常会使用到requests库来获取网页内容,然后使用BeautifulSoup、Scrapy或其他HTML解析库来解析页面结构,定位到想要的图片元素。这里是一个基本的步骤:
1. **导入必要的库**:
```python
import requests
from bs4 import BeautifulSoup
```
2. **发送HTTP请求**:
```python
url = '目标网页URL'
response = requests.get(url)
```
3. **解析网页**:
```python
soup = BeautifulSoup(response.text, 'html.parser')
img_tags = soup.find_all('img') # 或者根据class或id选择特定的图片
```
4. **提取图片链接**:
```python
image_links = [img['src'] for img in img_tags]
```
5. **保存图片** (如果图片是相对路径,需要加上域名):
```python
if not os.path.exists('images'):
os.makedirs('images')
for link in image_links:
response = requests.get(link, stream=True)
filename = os.path.join('images', os.path.basename(link))
with open(filename, 'wb') as f:
for chunk in response.iter_content(1024):
f.write(chunk)
```
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