pandas.Series.str.startswith

Series.str.startswith(pat, na=nan) [source]

Return boolean Series/array indicating whether each string in the Series/Index starts with passed pattern. Equivalent to str.startswith().

Parameters:

pat : string

Character sequence

na : bool, default NaN
Returns:

startswith : Series/array of boolean values

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https://pandas.pydata.org/pandas-docs/version/0.20.3/generated/pandas.Series.str.startswith.html