df = pd.DataFrame([[1,2,3], [10,20,30], [100,200,300]])
df.columns = pd.MultiIndex.from_tuples((("a", "b"), ("a", "c"), ("d", "f")))
df
kehrtUmbenennen Multiindex Spalten in Pandas
a d
b c f
0 1 2 3
1 10 20 30
2 100 200 300
und
df.columns.levels[1]
kehrt
Index([u'b', u'c', u'f'], dtype='object')
Ich möchte "f"
-"e"
umbenennen. Nach pandas.MultiIndex.rename
Ich betreibe:
df.columns.rename(["b1", "c1", "f1"], level=1)
Aber es wirft
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
<ipython-input-110-b171a2b5706c> in <module>()
----> 1 df.columns.rename(["b1", "c1", "f1"], level=1)
C:\Users\USERNAME\AppData\Local\Continuum\Miniconda2\lib\site-packages\pandas\indexes\base.pyc in set_names(self, names, level, inplace)
994 if level is not None and not is_list_like(level) and is_list_like(
995 names):
--> 996 raise TypeError("Names must be a string")
997
998 if not is_list_like(names) and level is None and self.nlevels > 1:
TypeError: Names must be a string
Ich benutze Python 2.7.12 |Continuum Analytics, Inc.| (default, Jun 29 2016, 11:07:13) [MSC v.1500 64 bit (AMD64)]'
und pandas 0.19.1