pandas.Series.str.startswith

Series.str.startswith(pat, na=nan)

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.

See also

str.startswith

Python standard library string method.

Series.str.endswith

Same as startswith, but tests the end of string.

Series.str.contains

Tests if string element contains a pattern.

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