Question

我认为这对有熊猫经验的人来说非常容易。我只想从OTHERNAMES列中找到字符串是子字符串的行。我更喜欢使用lambda函数的解决方案。

数据框是这样的：

ID NAME OTHERNAMES COUNTRY GPS_LEN GPS_LAT SPORT
1 Manchester City manchestercity|manchestercityfc|mancity England 53.483056 -2.200278 football
2 Leicester leicester|leicestercityfc England 52.620278 -1.142222 football

我希望这样的事情应该起作用：

teams_dict = pd.read_csv(file_path.csv)
teams_dict.OTHERNAMES[lambda s: s.str.split('|').isin(['mancity'])]

我不想使用s.str.contains（'mancity'），因为可能会有另一个名称为mancityb的团队，不应返回。分隔符'|'是重要的一部分。

但是我得到这个错误：

TypeError                                 Traceback (most recent call last)
TypeError: unhashable type: 'list'

The above exception was the direct cause of the following exception:

SystemError                               Traceback (most recent call last)
<ipython-input-149-b21630ad3067> in <module>
----> 1 teams_dict.OTHERNAMES[lambda s: s.str.split('|').isin(['mancity'])]

c:\program files\python36\lib\site-packages\pandas\core\series.py in __getitem__(self, key)
    763 
    764     def __getitem__(self, key):
--> 765         key = com._apply_if_callable(key, self)
    766         try:
    767             result = self.index.get_value(self, key)

c:\program files\python36\lib\site-packages\pandas\core\common.py in _apply_if_callable(maybe_callable, obj, **kwargs)
    406 
    407     if callable(maybe_callable):
--> 408         return maybe_callable(obj, **kwargs)
    409 
    410     return maybe_callable

<ipython-input-149-b21630ad3067> in <lambda>(s)
----> 1 teams_dict.OTHERNAMES[lambda s: s.str.split('|').isin(['mancity'])]

c:\program files\python36\lib\site-packages\pandas\core\series.py in isin(self, values)
   3588         Name: animal, dtype: bool
   3589         """
-> 3590         result = algorithms.isin(self, values)
   3591         return self._constructor(result, index=self.index).__finalize__(self)
   3592 

c:\program files\python36\lib\site-packages\pandas\core\algorithms.py in isin(comps, values)
    444             comps = comps.astype(object)
    445 
--> 446     return f(comps, values)
    447 
    448 

c:\program files\python36\lib\site-packages\pandas\core\algorithms.py in <lambda>(x, y)
    419 
    420     # faster for larger cases to use np.in1d
--> 421     f = lambda x, y: htable.ismember_object(x, values)
    422 
    423     # GH16012

pandas\_libs\hashtable_func_helper.pxi in pandas._libs.hashtable.ismember_object()

SystemError: <built-in method view of numpy.ndarray object at 0x000002A9BA12CDA0> returned a result with an error set

熊猫-选择行，其中字符串是列的子部分

0 个答案: