Series.str.
match
Determine if each string starts with a match of a regular expression.
pat (str) – Character sequence or regular expression.
case (bool, default True) – If True, case sensitive.
flags (int, default 0 (no flags)) – Regex module flags, e.g. re.IGNORECASE.
na (scalar, optional) – Fill value for missing values. The default depends on dtype of the array. For object-dtype, numpy.nan is used. For StringDtype, pandas.NA is used.
numpy.nan
StringDtype
pandas.NA
Series/array of boolean values
参见
fullmatch
Stricter matching that requires the entire string to match.
contains
Analogous, but less strict, relying on re.search instead of re.match.
extract
Extract matched groups.