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Marking indexes on a data frame

I have a multilevel index on a dataframe. When I ran

print(len(b.index.names))

I get 3. When I run

print(b.index.names)

I get [None, None, None].

How do I give each of the above index levels a unique name?

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2 answers


Or

b.rename_axis(['X', 'Y', 'Z'])


or

b.index.names = ['X', 'Y', 'Z']
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You can also assign with such a list so that the indices are named index_1

, index_2

and index_3

accordingly if more they are also named accordingly:



b.index.names = ["index_" + str(i+1) for i in range(len(b.index.names))]
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