python爬虫保存图片

Python爬虫保存图片可以通过requests库和os库来实现。

首先，使用requests库获取图片的二进制数据，并将其保存到本地文件中。代码如下：

import requests
import os

url = "http://example.com/image.jpg"
response = requests.get(url)
if response.status_code == 200:
    with open("image.jpg", "wb") as f:
        f.write(response.content)
        print("Image saved successfully!")
else:
    print("Failed to save image!")

其中，url为需要爬取的图片链接，response.content为获取到的二进制数据。通过with open语句，可以将二进制数据写入本地文件中，实现保存图片的功能。

如果需要保存多张图片，可以通过for循环来遍历图片链接，并为每张图片生成一个唯一的文件名，以免重名覆盖。代码如下：

import requests
import os

urls = ["http://example.com/image1.jpg", "http://example.com/image2.jpg", "http://example.com/image3.jpg"]
for url in urls:
    response = requests.get(url)
    if response.status_code == 200:
        filename = url.split("/")[-1]
        with open(filename, "wb") as f:
            f.write(response.content)
            print(f"{filename} saved successfully!")
    else:
        print(f"Failed to save {filename}!")

在保存图片之前，需要保证本地目录存在，否则需要通过os库创建对应的目录。代码如下：

import requests
import os

urls = ["http://example.com/image1.jpg", "http://example.com/image2.jpg", "http://example.com/image3.jpg"]
if not os.path.exists("images"):
    os.mkdir("images")
os.chdir("images")
for url in urls:
    response = requests.get(url)
    if response.status_code == 200:
        filename = url.split("/")[-1]
        with open(filename, "wb") as f:
            f.write(response.content)
            print(f"{filename} saved successfully!")
    else:
        print(f"Failed to save {filename}!")