pandera.backends.narwhals.builtin_checks.str_matches¶

pandera.backends.narwhals.builtin_checks.str_matches(col_expr, pattern)[source]¶

Ensure that all values start with a match of a regular expression pattern.

Parameters:

col_expr (Expr) – Narwhals column expression to check.
pattern (Union[str, Pattern]) – Regular expression pattern to use for matching.

Return type:

Expr