Python | Pandas MultiIndex.is_lexsorted()

Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric python packages. Pandas is one of those packages and makes importing and analyzing data much easier.

Pandas MultiIndex.is_lexsorted() function return True if the labels are lexicographically sorted. Otherwise the function return False indicating the labels are not lexicographically sorted.

Syntax: MultiIndex.is_lexsorted()

Parameters : None

Returns : boolean

Example #1: Use MultiIndex.is_lexsorted() function to check if the MultiIndex labels are lexicographically sorted or not.

# importing pandas as pd
import pandas as pd

# Create the MultiIndex
midx = pd.MultiIndex.from_arrays([['Networking', 'Cryptography',
                                     'Anthropology', 'Science'],
                                             [88, 84, 98, 95]])

# Print the MultiIndex
print(midx)

Output :

Now let’s check if the labels in the MultiIndex are lexicographically sorted or not.

# check if labels are sorted or not
midx.is_lexsorted()

Output :

As we can see in the output, the function has returned false indicating that the labels in the MultiIndex are not lexicographically sorted.

Example #2: Use MultiIndex.is_lexsorted() function to check if the MultiIndex labels are lexicographically sorted or not.

# importing pandas as pd
import pandas as pd

# Create the MultiIndex
midx = pd.MultiIndex.from_arrays([['Anthropology', 'Cryptography',
                                         'Networking', 'Science'],
                                               [88, 84, 98, 95]])

# Print the MultiIndex
print(midx)

Output :

Now let’s check if the labels in the MultiIndex are lexicographically sorted or not.

# check if labels are sorted or not
midx.is_lexsorted()

Output :

As we can see in the output, the function has returned true indicating that the labels in the MultiIndex are lexicographically sorted.