Fleischpflanzerl
Fleischpflanzerl
Programming language:Python
2021-06-18 14:50:38
0
Q:

pandas count the number of unique values in a column

Jan Doggen
Jan Doggen
Code: Python
2021-03-26 22:02:31 
df['hID'].nunique()
5
2
Cute
Cute
Code: Python
2021-03-26 22:01:16 
df['column'].nunique()
3
Austin Hemmelgarn
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
Caius Jard
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
jobin
jobin
Code: Python
2021-09-07 02:13:40 
for col in df:
    print(df[col].unique())
1
Tox
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
Erich Duft
Erich Duft
Code: Python
2021-02-03 14:25:09 
pd.value_counts(df.Account_Type)

Gold        3
Platinum    1
Name: Account_Type, dtype: int64
1
Sander
Sander
Code: Python
2021-03-26 22:03:02 
df.nunique()
1

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