小编Joh*_*dly的帖子

我试图从 pandas Dataframe 中提取由 ID 分割的值。但是，当我提供 apply groupby 时，它不会让我提供轴参数来按行应用函数

raw_data = {"id":{"0":"mergedshape_route_0009","1":"mergedshape_route_0009","2":"mergedshape_route_0009","3":"mergedshape_route_0009","4":"mergedshape_route_0009","5":"mergedshape_route_0009","6":"mergedshape_route_0009","7":"mergedshape_route_0009","8":"mergedshape_route_0009","9":"mergedshape_route_0009"},"shape_pt_lat":{"0":-6.8196991355,"1":-6.8194035167,"2":-6.8192916609,"3":-6.8192597021,"4":-6.8193262829,"5":-6.819395527,"6":-6.8194451,"7":-6.8192582,"8":-6.8184049,"9":-6.8177623},"shape_pt_lon":{"0":39.2987716198,"1":39.2989432812,"2":39.299055934,"3":39.29918468,"4":39.2993053794,"5":39.2993938923,"6":39.2994472,"7":39.2995691,"8":39.2999065,"9":39.2986298},"shape_pt_sequence":{"0":0,"1":1,"2":2,"3":3,"4":4,"5":5,"6":6,"7":7,"8":8,"9":9},"shape_dist_traveled":{"0":0,"1":0,"2":0,"3":0,"4":0,"5":0,"6":0,"7":0,"8":0,"9":0}}

df = pd.DataFrame(raw_data).groupby("id").apply(lambda row: row.shape_pt_lat, axis = 1)

我收到这个错误

TypeError                                 Traceback (most recent call last)
~\Miniconda3\envs\data_analysis\lib\site-packages\pandas\core\groupby\groupby.py in apply(self, func, *args, **kwargs)
    917             try:
--> 918                 result = self._python_apply_general(f)
    919             except Exception:

~\Miniconda3\envs\data_analysis\lib\site-packages\pandas\core\groupby\groupby.py in _python_apply_general(self, f)
    935         keys, values, mutated = self.grouper.apply(f, self._selected_obj,
--> 936                                                    self.axis)
    937 

~\Miniconda3\envs\data_analysis\lib\site-packages\pandas\core\groupby\groupby.py in apply(self, f, data, axis)
   2272             group_axes = _get_axes(group)
-> 2273             res = f(group)
   2274             if not _is_indexed_like(res, group_axes):

~\Miniconda3\envs\data_analysis\lib\site-packages\pandas\core\groupby\groupby.py in …