-> 6794 label = self._maybe_cast_slice_bound(label, side) 6796 # we need to look up the label 6797 try: File ~/work/pandas/pandas/pandas/core/indexes/datetimes.py:642, in DatetimeIndex._maybe_cast_slice_bound(self, label, side) 637 if isinstance(label, dt.date) and not isinstance(...
in Flags.allows_duplicate_labels(self, value) 94 if not value: 95 for ax in obj.axes: ---> 96 ax._maybe_check_unique() 98 self._allows_duplicate_labels = value File ~/work/pandas/pandas/pandas/core/indexes/base.py:715, in Index._maybe_check_unique(...
File ~/work/pandas/pandas/pandas/core/indexes/base.py:3812,inIndex.get_loc(self, key)3807ifisinstance(casted_key,slice)or(3808isinstance(casted_key, abc.Iterable)3809andany(isinstance(x,slice)forxincasted_key)3810):3811raiseInvalidIndexError(key) ->3812raiseKeyError(key)fromerr3813exceptTypeError...
In [24]:type(a.index) Out[24]: pandas.core.indexes.base.Index In [25]:type(a.values) Out[25]: numpy.ndarray 由上面的代码可以看出,pandas Series一维数组实际上是由一个numpy一维数组和类型为pandas.core.indexes.base.Index的一维数组拼成的。 DataFrame多维数组# 创建DataFrame多维数组# Copy # 要创...
In[26]:s["f"]---KeyErrorTraceback(mostrecentcalllast)File~/work/pandas/pandas/pandas/core/indexes/base.py:3805,inIndex.get_loc(self,key)3804try:->3805returnself._engine.get_loc(casted_key)3806exceptKeyErroraserr:Fileindex.pyx:167,inpandas._libs.index.IndexEngine.get_loc()Fileindex.pyx:...
Help on function timedelta_range in module pandas.core.indexes.timedeltas:timedelta_range(start=None, end=None, periods: 'Optional[int]' = None, freq=None, name=None, closed=None) -> 'TimedeltaIndex'Return a fixed frequency TimedeltaIndex, with day as the defaultfrequency.Parameters---start ...
您可以使用index,columns和values属性访问数据帧的三个主要组件。columns属性的输出似乎只是列名称的序列。 从技术上讲,此列名称序列是Index对象。 函数type的输出是对象的完全限定的类名。 变量columns的对象的全限定类名称为pandas.core.indexes.base.Index。 它以包名称开头,后跟模块路径,并以类型名称结尾。 引用对...
t1= pd.to_datetime(time_list1, errors="ignore")print(t1, type(t1))print("")t2 = pd.to_datetime(time_list1, errors="coerce")print(t2)Index(['20171019', '20181020', 'bbbb', '20191021'], dtype='object') <class 'pandas.core.indexes.base.Index'> DatetimeIndex(['2017-10-19', '...
python3.7/site-packages/pandas/core/indexes/base.py in __setitem__(self, key, value) 2063 2064 def __setitem__(self, key, value): -> 2065 raise TypeError("Index does not support mutable operations") 2066 2067 def __getitem__(self, key): TypeError: Index does not support mutable ...
\Anaconda3\lib\site-packages\pandas\core\indexes\base.py in __getitem__(self, key),程序员大本营,技术文章内容聚合第一站。