pandas.Series.str.startswith — pandas 0.24.2 documentation (original) (raw)
Series.str. startswith(pat, na=nan)[source]¶
Test if the start of each string element matches a pattern.
Equivalent to str.startswith().
| Parameters: | pat : str Character sequence. Regular expressions are not accepted. na : object, default NaN Object shown if element tested is not a string. |
|---|---|
| Returns: | Series or Index of bool A Series of booleans indicating whether the given pattern matches the start of each string element. |
Examples
s = pd.Series(['bat', 'Bear', 'cat', np.nan]) s 0 bat 1 Bear 2 cat 3 NaN dtype: object
s.str.startswith('b') 0 True 1 False 2 False 3 NaN dtype: object
Specifying na to be False instead of NaN.
s.str.startswith('b', na=False) 0 True 1 False 2 False 3 False dtype: bool