It is a capital mistake to theorize before one has data.
Chapter 5Working with Tabular Numeric Data
Often raw data comes from all kinds of text documents. Quite often the text actually represents numbers. Excel and CSV spreadsheets and especially database tables may contain millions or billions of numerical records. Core Python is an excellent text-processing tool, but it sometimes fails to deliver adequate numeric performance. That’s where numpy comes to the rescue.
NumPy—Numeric Python (imported as numpy)—is an interface to a family of efficient and parallelizable functions that implement high-performance numerical operations. The module numpy provides a new Python data structure—array—and a toolbox ...
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