polars.Series.str.starts_with#

Series.str.starts_with(prefix: str | Expr) → Series[source]#

Check if string values start with a substring.

Parameters:

prefix: Prefix substring.

See also

contains: Check if the string contains a substring that matches a pattern.
ends_with: Check if string values end with a substring.

Examples

>>> s = pl.Series("fruits", ["apple", "mango", None])
>>> s.str.starts_with("app")
shape: (3,)
Series: 'fruits' [bool]
[
    true
    false
    null
]