Prompt
What should I use for cleaning and normalizing scraped web data?
Latest observation
Oct 4, 2026
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For scraped web data, a good cleaning/normalization stack is usually:
- Python + pandas for general cleaning, deduping, type conversion, and shaping tables
- BeautifulSoup / lxml for parsing HTML
- re and regex for text cleanup
- ftfy for fixing broken Unicode/text encoding issues
- unidecode if you need ASCII-only normalization
- dateutil or pendulum for parsing messy dates
- rapidfuzz for fuzzy matching and deduplication
- great_expectations or pandera for data validation
- OpenRefine for interactive/manual cleaning when data is messy or exploratory
Typical normalization steps:
- Remove HTML tags and boilerplate
- Standardize whitespace and Unicode
- Convert dates, numbers, and currencies to consistent formats
- Normalize casing, punctuation, and special characters
- Standardize categories/labels
- Deduplicate records
- Validate schema and missing values
If you’re handling large-scale or production pipelines, consider:
- Polars instead of pandas for speed
- Spark for distributed processing
- dbt if the data is already in a warehouse
If you want, I can recommend a best stack based on your language, data size, and type of scraped data.