mars.dataframe.Series.str.startswith#
- Series.str.startswith(pat, na=None)#
Test if the start of each string element matches a pattern.
Equivalent to
str.startswith()
.- 参数
- 返回
A Series of booleans indicating whether the given pattern matches the start of each string element.
- 返回类型
Series or Index of bool
参见
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.
实际案例
>>> import mars.tensor as mt >>> import mars.dataframe as md >>> s = md.Series(['bat', 'Bear', 'cat', mt.nan]) >>> s.execute() 0 bat 1 Bear 2 cat 3 NaN dtype: object
>>> s.str.startswith('b').execute() 0 True 1 False 2 False 3 NaN dtype: object
Specifying na to be False instead of NaN.
>>> s.str.startswith('b', na=False).execute() 0 True 1 False 2 False 3 False dtype: bool