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Python | Pandas MultiIndex.reorder_levels ()

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MultiIndex.reorder_levels() Pandas MultiIndex.reorder_levels() is used to reorder levels using input order ... It cannot drop or duplicate levels. The function takes a list of inputs that contains the desired order of MultiIndex levels.

Syntax: MultiIndex.reorder_levels (order)

Parameters:
order: list containing the order of levels

Returns: A new MultiIndex

Example # 1: Use MultiIndex.reorder_levels () to reorder MultiIndex levels.

# import pandas as pd

import pandas as pd

 
# Create MultiIndex

midx = pd.MultiIndex.from_arrays ([[ ’Networking’  , ’Cryptography’

  ’Anthropology’ , ’ Science’ ], 

[ 88 , 84 , 98 , 95 ]])

 
# Print MultiIndex

print (midx)

Output:

Now let’s change the MultiIndex level.

# reorder levels so that
# 1st level appears before 0th

midx.reorder_levels ([ 1 , 0 ])

Output:

As we can see in the output, the function returned a new MultiIndex with levels set in the order passed.

Example # 2: Use MultiIndex.reorder_levels () to reorder MultiIndex levels.

# import pandas as pd

import pandas as pd < / code>

 
# Create MultiIndex

midx = pd.MultiIndex.from_arrays ([[ ’ Beagle’ , ’Sephard’ , ’Labrador’ , ’ Retriever’ ], 

  [ 8 , 4 , 11 , 3 ], [ ’A1’ , ’ B1’ , ’A2’ , ’C1’ ]])

  
# Print MultiIndex

print (midx)

Output:

Now let’s change the order of the MultiIndex levels.

# change the order of levels

midx.reorder_levels ([ 0 , 2 , 1 ])

Output:

Like As we see in the output, the function returned a new MultiIndex with the levels set in the passed order.

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