Count unique values pandas

Jan Doggen

Code: Python

2021-03-26 22:02:31

df['hID'].nunique()
5

2

Cute

Code: Python

2021-03-26 22:01:16

df['column'].nunique()

3

Austin Hemmelgarn

Code: Python

2021-07-16 20:19:36

#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}

1

Seitaridis

Code: Python

2021-02-04 13:05:24

df = df.groupby(by='domain', as_index=False).agg({'ID': pd.Series.nunique})
print(df)
    domain  ID
0       fb   1
1      ggl   1
2  twitter   2
3       vk   3

1

Caius Jard

Code: Python

2021-03-26 21:59:27

df.groupby('mID').agg(['count', 'size', 'nunique']).stack()


             dID  hID  uID
mID                       
A   count      5    5    5
    size       5    5    5
    nunique    3    5    5
B   count      2    2    2
    size       2    2    2
    nunique    2    2    2
C   count      1    1    1
    size       1    1    1
    nunique    1    1    1

2

yashwant k

Code: Python

2021-03-26 22:00:29

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

1

Tox

Code: Python

2021-03-26 22:01:55

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

0

Sander

Code: Python

2021-03-26 22:03:02

df.nunique()

1

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