cudf.core.column.string.StringMethods.startswith#

StringMethods.startswith(pat: str | Sequence) → SeriesOrIndex[source]#

Test if the start of each string element matches a pattern.

Equivalent to str.startswith().

Parameters:

patstr or list-like: If str is an str, evaluates whether each string of series starts with pat. If pat is a list-like, evaluates whether self[i] starts with pat[i]. Regular expressions are not accepted.

Returns:

Series or Index of bool: A Series of booleans indicating whether the given pattern matches the start of each string element.

See also

endswith: Same as startswith, but tests the end of string.
contains: Tests if string element contains a pattern.

Examples

>>> import cudf
>>> s = cudf.Series(['bat', 'Bear', 'cat', None])
>>> s
0     bat
1    Bear
2     cat
3    <NA>
dtype: object
>>> s.str.startswith('b')
0     True
1    False
2    False
3     <NA>
dtype: bool