Time-Series Data

Time-Series Data is data indexed by time: dates, datetimes, or ordered intervals. In Brevvie Python + AI — Section 3: Data, Polars & Pair Programming, time-series analysis appears through examples like QQQ price history.

Key practices from the source

• parse date strings into real date/datetime dtypes
• sort by time before analysis
• filter to a date window
• aggregate at larger time buckets like month

Why it matters

Time-series work often fails quietly when timestamps remain plain strings. The lesson stresses converting them early and checking schema.