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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Having said that, I've had pretty decent luck with PDFMiner.six (github link) for various extractions. Sometimes PDFs are decently structured HTML under the hood as well, so you might look into dumping the PDF to HTML, then parsing it with an HTML library like LXML or use Python's HTML.parser as part of the standard Python library (assuming the structured HTML is actually functional; can check by dumping the PDF to an .html document and opening it in a web browser.)
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