pandas.DataFrame.first

DataFrame.first(offset) [source]

Convenience method for subsetting initial periods of time series data based on a date offset.

Parameters: offset : string, DateOffset, dateutil.relativedelta
Returns: subset : type of caller

Examples

ts.first(‘10D’) -> First 10 days

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https://pandas.pydata.org/pandas-docs/version/0.20.3/generated/pandas.DataFrame.first.html