indexer=self.columns.get_loc(key) File"E:\py36\lib\site-packages\pandas\core\indexes\base.py",line2648,inget_loc returnself._engine.get_loc(self._maybe_cast_indexer(key)) File"pandas\_libs\index.pyx",line111,in
indexer = self.columns.get_loc(key)File"D:\Softwares\Python3.6.8\lib\site-packages\pandas\core\indexes\base.py",line2648,inget_locreturnself._engine.get_loc(self._maybe_cast_indexer(key))File"pandas\_libs\index.pyx",line111,inpandas._libs.index.IndexEngine.get_locFile"pandas\_libs\index...
File "C:\Users\yj\Anaconda3\lib\site-packages\pandas\core\frame.py", line 2906, in __getitem__ indexer = self.columns.get_loc(key) File "C:\Users\yj\Anaconda3\lib\site-packages\pandas\core\indexes\base.py", line 2900, in get_loc raise KeyError(key) from err KeyError: 'sex' >>...
columns.nlevels > 1: return self._getitem_multilevel(key) indexer = self.columns.get_loc(key) if is_integer(indexer): indexer = [indexer] else: if is_iterator(key): key = list(key) indexer = self.columns._get_indexer_strict(key, "columns")[1] # take() does not accept boolean ...
indexer = self.columns.get_loc(key)File "D:\Softwares\Python3.6.8\lib\site-packages\pandas\core\indexes\base.py", line 2648, in get_loc return self._engine.get_loc(self._maybe_cast_indexer(key))File "pandas\_libs\index.pyx", line 111, in pandas._libs.index.IndexEngine.get_loc Fi...
(self, method="reindex") File ~/work/pandas/pandas/pandas/core/generic.py:5633, in NDFrame._reindex_axes(self, axes, level, limit, tolerance, method, fill_value, copy) 5630 continue 5632 ax = self._get_axis(a) -> 5633 new_index, indexer = ax.reindex( 5634 labels, level=level, ...
| DataFrame | df.loc[row_indexer,column_indexer] | ## 基础知识 如在上一节介绍数据结构时提到的,使用[]进行索引(在 Python 中实现类行为的熟悉者称之为__getitem__)的主要功能是选择出低维度切片。下表显示了使用[]对pandas 对象进行索引时的返回类型值: 对象类型 选择 返回值类型 Series series[label]...
pandas层次化索引 1. 创建多层行索引 1) 隐式构造 最常见的方法是给DataFrame构造函数的index参数传递两个或更多的数组 Series也可以创建多层索引 import numpy as np import pandas as pd from pandas import Serie
result, index=self.index, columns=self.columns, default_kind=self._default_kind, default_fill_value=self._default_fill_value).__finalize__(self) def __getstate__(self): # pickling return dict(_typ=self._typ, _subtyp=self._subtyp, _data=self._data, _default_fill_value=self._default...
validate_key(key, axis)-> 1411 return self._get_slice_axis(key, axis=axis)1412 elif com.is_bool_indexer(key):1413 return self._getbool_axis(key, axis=axis)File ~/work/pandas/pandas/pandas/core/indexing.py:1443, in _LocIndexer._get_slice_axis(self, slice_obj, axis)1440 return obj...