Skip to content
Related Articles

Related Articles

Improve Article
Python | Pandas MultiIndex.from_arrays()
  • Last Updated : 24 Dec, 2018

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.from_arrays() function is used to convert arrays into MultiIndex. It is one of the several ways in which we construct a MultiIndex.

Syntax: MultiIndex.from_arrays(arrays, sortorder=None, names=None)

Parameters :
arrays : Each array-like gives one level’s value for each data point. len(arrays) is the number of levels
sortorder : Level of sortedness (must be lexicographically sorted by that level)

Returns: index : MultiIndex



Example #1: Use MultiIndex.from_arrays() function to construct a MultiIndex from arrays.




# importing pandas as pd
import pandas as pd
  
# Creating the array
array =[[1, 2, 3], ['Sharon', 'Nick', 'Bailey']]
  
# Print the array
print(array)

Output :

Now let’s create the MultiIndex using this array




# Creating the MultiIndex
midx = pd.MultiIndex.from_arrays(array,
            names =('Number', 'Names'))
  
# Print the MultiIndex
print(midx)

Output :

As we can see in the output, the function has created a MultiIndex object using the arrays.
 
Example #2: Use MultiIndex.from_arrays() function to construct a MultiIndex from arrays.




# importing pandas as pd
import pandas as pd
  
# Creating the array
array =[[1, 2, 3], ['Sharon', 'Nick', 'Bailey'], 
          ['Doctor', 'Scientist', 'Physicist']]
  
# Print the array
print(array)

Output :

Now let’s create the MultiIndex using this array




# Creating the MultiIndex
midx = pd.MultiIndex.from_arrays(array, 
   names =('Ranking', 'Names', 'Profession'))
  
# Print the MultiIndex
print(midx)

Output :

As we can see in the output, the function has created a MultiIndex using the passed arrays.

 Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.  

To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course. And to begin with your Machine Learning Journey, join the Machine Learning – Basic Level Course




My Personal Notes arrow_drop_up
Recommended Articles
Page :