pandas.MultiIndex.get_level_values

函数定义

MultiIndex.get_level_values(level)

Return vector of label values for requested level.Length of returned vector is equal to the length of the index.

函数参数

• level:int or str
  level is either the integer position of the level in the MultiIndex, or the name of the level.

• Returns: values: Index
  Values is a level of this MultiIndex converted to a single Index (or subclass thereof).

例子

mi = pd.MultiIndex.from_arrays((list('abc'), list('def')))
mi.names = ['level_1', 'level_2']

mi.get_level_values(0)
Index(['a', 'b', 'c'], dtype='object', name='level_1')
mi.get_level_values('level_2')
Index(['d', 'e', 'f'], dtype='object', name='level_2')