Count Unique Elements in pandas DataFrame Column in Python (Example Code)

In this Python tutorial you’ll learn how to get the number of unique elements in a pandas DataFrame variable.

Setting up the Example

import pandas as pd                               # Import pandas library
my_df = pd.DataFrame({'A':[7, 7, 4, 1, 2, 8, 2],  # Construct example DataFrame in Python
                      'B':range(1, 8)})
print(my_df)                                      # Display example DataFrame in console
#    A  B
# 0  5  1
# 1  7  2
# 2  4  3
# 3  1  4
# 4  2  5
# 5  8  6
# 6  2  7

Example: Get Count of Unique Values in Particular pandas DataFrame Variable

print(my_df['A'].nunique())                       # Count unique values in column
# 5

Leave a Reply

Your email address will not be published.

Fill out this field
Fill out this field
Please enter a valid email address.
You need to agree with the terms to proceed

Menu
Top