Closed Hardeepex closed 6 months ago
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docs/tutorial.md
✓ https://github.com/Hardeepex/scrapegost/commit/d07c78f25e10a729c4736e4ef573801a282dea42 Edit
Modify docs/tutorial.md with contents:
• Add a section on best practices for writing efficient and robust scraping code. This could include advice on choosing appropriate selectors, preprocessing HTML to reduce token count, and handling potential errors or exceptions.
• Include examples of these best practices in the tutorial code. For instance, demonstrate how to use the `CSS` preprocessor to extract relevant content, or how to handle the `TooManyTokens` error.
• Add a section on potential use cases for the scraping tool. This could include examples of scraping unstructured text, dealing with pages that change frequently, or quick prototyping.
--- +++ @@ -82,6 +82,37 @@ We can see from the logging output that the content length is much shorter now and we get the data we were hoping for. All for less than a penny! + +### Best Practices for Efficient Scraping + +When constructing a web scraper, it is essential to follow best practices to ensure efficiency and robustness: + +- **Use Specific Selectors**: Choose selectors that target the specific content you need. This minimizes the amount of unnecessary HTML sent to the scraper and reduces the likelihood of it breaking when the page structure changes. + +- **Preprocess HTML**: Use preprocessors like `CSS` to extract relevant content before passing it to the scraper. Not only does this lower token count, but it also ensures that irrelevant content, such as comments and script tags, do not interfere. + +- **Error Handling**: Implement robust error handling to manage exceptions, such as `TooManyTokens`. When you encounter this error, consider using CSS selectors to reduce the HTML content size or splitting the content into smaller chunks that are within token limits for individual scraping operations. + +#### Example: Efficient Preprocessing and Error Handling + +In the case of the `TooManyTokens` error with our episode details scraper, we can add the `CSS` preprocessor step to avoid the error and streamline the scraping process. + +```python hl_lines="13 14" +# Incorporate CSS preprocessor to focus on relevant content +CSS("div.page-content").preprocess + +# Implementation of error handling +try: + # Call to the scraper + data = episode_scraper(scrape_url).data +except scrapeghost.scrapers.TooManyTokens as e: + # Handling the exception + print("Encountered error: ", e) + # Implement a strategy to reduce tokens, like preprocessing or splitting + +``` + +By applying these techniques, we adhere to best practices for efficient and reliable scraping. !!! tip @@ -202,7 +233,19 @@ As a safeguard, the maximum cost for a single scrape is configured to $1 by default. If you want to change this, you can set the `max_cost` parameter. -One option is to lower the `auto_split_length` a bit further. Many more requests means it takes even longer, but if you can stick to GPT-3.5-Turbo it was possible to get a scrape to complete for $0.13. +One option is to lower the `auto_split_length` a bit further. This can help manage large pages and ensure each chunk stays within the token limits. + +### Use Cases for the Scraping Tool + +`scrapeghost` offers versatility for various scraping scenarios: + +- **Scraping Unstructured Text**: When dealing with unstructured data on web pages, the tool can help standardize and extract valuable information. + +- **Frequent Page Changes**: Pages that change regularly are challenging to scrape with static selectors. `scrapeghost`'s ability to understand context can be particularly useful here. + +- **Quick Prototyping**: When you need to create a proof-of-concept quickly, `scrapeghost` can scrape and structure data without the need for developing complex scraping logic specific to each site. + +Incorporating `scrapeghost` into these use cases can significantly streamline the data extraction process. Many more requests means it takes even longer, but if you can stick to GPT-3.5-Turbo it was possible to get a scrape to complete for $0.13. But as promised, this is something that `scrapeghost` isn't currently very good at.
docs/tutorial.md
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docs/faq.md
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Modify docs/faq.md with contents:
• Expand on the advantages and disadvantages of using the scraping tool. This could include more detailed explanations of when and why the tool might be preferable to traditional scraping methods, as well as potential limitations or challenges.
• Include more detailed information on the cost of using the tool, as this is likely to be a key consideration for users. This could include examples of how to use the cost-limiting features.
--- +++ @@ -12,7 +12,23 @@ ## Why would I use this instead of a traditional scraper? -It is definitely great for quick prototypes. With the CLI tool, you can try a scrape in a *single command* without writing a line of code. +It is definitely great for quick prototypes and ad-hoc data extraction. The CLI tool allows you to initiate a scraping session with a *single command* without writing any code, making it ideal for rapid testing and development. + +Advantages over traditional scrapers are several-fold: + +- **Flexibility in Unstructured Data Handling**: Traditional scrapers rely on fixed patterns or selectors, which may fail when a website changes. `scrapeghost`'s model-based approach is adept at interpreting unstructured data and adapts more gracefully to changes in page structure. + +- **Ease of Use for Non-Developers**: The ability to use natural language instructions makes `scrapeghost` more accessible to those without extensive programming or web scraping experience. + +- **Speed of Deployment**: Setting up `scrapeghost` is faster compared to writing a full-fledged scraper, saving valuable time especially when dealing with simple or one-off scraping tasks. + +However, there are also challenges and limitations to consider: + +- **Costs of API Usage**: While it can be efficient in terms of development time, costs can accumulate with extensive use of the API, especially for larger or more complex scraping tasks. + +- **Opaque Errors**: Troubleshooting is made harder by less transparent error messages, which could hinder understanding of why certain extractions fail. + +- **Dependence on Upstream Provider**: The reliance on OpenAI's models means any changes in their API, pricing, or availability can directly impact your scraping capabilities. This means you don't need to sink a bunch of time into deciding if it's worth it or not. Or, imagine a scraper that needs to run infrequently on a page that is likely to break in subtle ways between scrapes. @@ -76,9 +92,19 @@ ## How much did you spend developing this? -So far, about $40 on API calls, switching to GPT-3.5 as the default made a big difference. +So far, the expenditure on API calls is approximately $40, which reflects careful management of the tool's functionality to minimize costs. -My most expensive call was a paginated GPT-4 call that cost $2.20. I decided to add the cost-limiting features after that. +Cost-Control Strategies: + +- **Max Cost Limiting**: It's possible to set a maximum cost at which the scraping tool will stop processing, ensuring that you never exceed your budget. For instance, a GPT-4 call that would normally cost $2.20 can be limited to a lower threshold. + +- **Selective Scraping**: Preprocess the HTML to target only the essential content or use split strategies to efficiently distribute API calls across sections of a page. + +- **Efficiency Adjustments**: Switching to models like GPT-3.5 can significantly reduce costs, providing a balance between performance and affordability. Optimization of prompts and careful configuration of tool parameters can also help keep the costs in check. + +- **Cost Tracking**: Keeping a close eye on the expenditure and adjusting your scraping strategy allows for incremental improvement in both cost-efficiency and the quality of results. + +These examples illustrate how integral cost management is to the sustainable use of scraping tools and highlight the importance of understanding and utilizing cost-limiting features. ## What's with the license?
docs/faq.md
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docs/contributing.md
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Modify docs/contributing.md with contents:
• Add a section on how to contribute improvements to the scraping code. This could include guidelines for submitting pull requests, as well as advice on testing changes to ensure they do not break existing functionality.
--- +++ @@ -8,9 +8,15 @@ 2. Clone your forked repository to your local machine. 3. Install the project's dependencies. You can do this by running `pip install -r requirements.txt`. -## Running Tests +## Testing Your Changes -To ensure that your changes do not break existing functionality, please run the project's test suite before submitting a pull request. You can run the tests by executing `pytest` in the project's root directory. +It is crucial to test your changes to ensure they do not negatively impact existing functionality. Follow these steps to test your code: + +1. Write new test cases that cover the new features or improvements you are making. +2. Run the existing project's test suite by executing `pytest` in the project's root directory. Ensure existing tests pass along with your new test cases. +3. If tests fail, review your code, make the necessary corrections, and repeat the testing process. + +By thoroughly testing, you help maintain the robustness of Scrapegost. ## Submitting a Pull Request
docs/contributing.md
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