Index.get_indexer 方法的含义

表示,to_match 中的字符,在 unoque_vals 中的位置索引

转载于:https://www.cnblogs.com/rougan/p/10071537.html

KeyError Traceback (most recent call last) ~\Anaconda3\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance) 2656 try: -> 2657 return self._engine.get_loc(key) 2658 except KeyError: pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc() pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc() pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item() pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item() KeyError: 'J' During handling of the above exception, another exception occurred: KeyError Traceback (most recent call last) <ipython-input-8-b8ad3aacc564> in <module> 27 return np.nan 28 ---> 29 df['J'] = df['J'].apply(week_str_to_float) 30 31 # 3. BMI 二次校验 / 修正 ~\Anaconda3\lib\site-packages\pandas\core\frame.py in __getitem__(self, key) 2925 if self.columns.nlevels > 1: 2926 return self._getitem_multilevel(key) -> 2927 indexer = self.columns.get_loc(key) 2928 if is_integer(indexer): 2929 indexer = [indexer] ~\Anaconda3\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance) 2657 return self._engine.get_loc(key) 2658 except KeyError: -> 2659 return self._engine.get_loc(self._maybe_cast_indexer(key)) 2660 indexer = self.get_indexer([key], method=method, tolerance=tolerance) 2661 if indexer.ndim > 1 or indexer.size > 1: pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc() pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc() pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item() pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtab
最新发布
09-05
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