AttributeError: 'DataFrame' object has no attribute 'unique'
The error message "'DataFrame' object has no attribute 'unique'" occurs when you are trying to use the
unique()
method on a pandas DataFrame object, but this method is only available for pandas Series objects.#1. Applying unique to dataframe
df = pd.DataFrame([{"A":"aaa","B":"bbb"}])
print(df.unique()) #Throws error
#2. Error can be reproduced if dataframe has multiple columns with same name.The error can pop-up if column is renamed mistakenly.
import pandas as pd
df = pd.DataFrame([{"A":"aaa","B":"bbb"}])
print(df)
print(df['A'].dropna().unique()) #works fine
df =df.rename(columns={ df.columns[1]:df.columns[0] }) # column
print(df)
print(df['A'].dropna().unique()) #
Hope it helps!!