foundryts.functions.time_extent

foundryts.functions.time_extent()

Returns a function that extracts the time extent (earliest and latest timestamps) of a single time series.

The returned function computes the time extent by identifying the range from the first to the last timestamp in the given time series.

• Returns: A function that accepts a single time series and returns its time extent. The dataframe contains a single row with the time extent.
• Return type: (FunctionNode) -> SummarizerNode

Dataframe schema

Examples

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>>> series = F.points(
...     (1, 0.0),
...     (101, 10.2),
...     (200, 11.3),
...     (123450, 11.8),
... )
>>> series.to_pandas()
                      timestamp  value
0 1970-01-01 00:00:00.000000001    0.0
1 1970-01-01 00:00:00.000000101   10.2
2 1970-01-01 00:00:00.000000200   11.3
3 1970-01-01 00:00:00.000123450   11.8

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>>> time_ext = F.time_extent()(series)
>>> time_ext.to_pandas()
      extent.earliest_timestamp       extent.latest_timestamp
0 1970-01-01 00:00:00.000000001 1970-01-01 00:00:00.000123450