Answered by : lovely-locust-or0b07szd8wx

#TO count repetition of each unique values(to find How many times the same-
# unique value is appearing in the data)
item_counts = df["Your_Column"].value_counts()
#Returns Dictionary => {"Value_name" : number_of_appearences} 

Source : | Last Update : Wed, 25 Nov 20

Answered by : happy-hornet-pv075drr5wf4

data = df.groupby('ColumnName')['IDColumnName'].nunique()
print(data)

Source : | Last Update : Sat, 14 Nov 20

Answered by : dark-duck-nltzlo5xmvhe

df = df.groupby('domain')['ID'].nunique()
print (df)
domain
'facebook.com' 1
'google.com' 1
'twitter.com' 2
'vk.com' 3
Name: ID, dtype: int64

Source : https://stackoverflow.com/questions/38309729/count-unique-values-with-pandas-per-groups | Last Update : Thu, 04 Jun 20

Answered by : muhammad-saad

df['column_name'].value_counts()

Source : | Last Update : Tue, 31 May 22

Answered by : ruben-visser

#count unique values in each column
df.nunique()
#count unique values in each row
df.nunique(axis=1)

Source : https://www.statology.org/pandas-count-unique-values/ | Last Update : Fri, 15 Jul 22

Answered by : dark-duck-nltzlo5xmvhe

df['hID'].nunique()
5

Source : https://stackoverflow.com/questions/45759966/counting-unique-values-in-a-column-in-pandas-dataframe-like-in-qlik/45760042 | Last Update : Thu, 04 Jun 20

Answered by : bewildered-barracuda-w7vt9pjac2x8

dataframe.column.nunique()

Source : https://thispointer.com/pandas-get-unique-values-in-single-or-multiple-columns-of-a-dataframe-in-python/ | Last Update : Sat, 06 Jun 20

Answered by : you

import pandas as pd
# Assuming the DataFrame is already defined and contains the desired column
df = pd.DataFrame({'column_name': ['value1', 'value2', 'value1', 'value3', 'value2']})
# Count the number of unique values in the 'column_name' column
unique_count = df['column_name'].nunique()
# Print the result
print("Number of unique values:", unique_count)

Source : | Last Update : Tue, 19 Sep 23

Answered by : elated-elk-04yy7zoieptj

df = df.groupby('domain')['ID'].nunique()

Source : https://www.codegrepper.com/code-examples/python/get+count+of+unique+values+in+column+pandas | Last Update : Thu, 29 Apr 21

Answered by : charred-dolphin

df.nunique()

Source : | Last Update : Thu, 19 Mar 20