crawlee-python

```python
from crawlee import Scraper

# Initialize the scraper
scraper = Scraper(
    start_urls=['https://example.com/products'],
    proxy_rotation=True
)

# Define the data extraction function
@scraper.extract
def parse_product(response):
    return {
        'name': response.css('h1.product-title::text').get(),
        'price': response.css('.price::text').get(),
        'availability': response.css('.availability::text').get(),
    }

# Handle pagination
scraper.add_pagination(
    next_page_selector='.pagination .next',
)

# Run the scraper
scraper.run()
```
This code snippet initializes a web scraper for products on a sample website, extracts product names, prices, and availability, and handles pagination with proxy rotation.