Python data analysis actual combat - deduplicate a column of dataframe and count the number after deduplication (with source code and implementation effect)

Realize function

The deduplicated value and quantity of a certain column of dataframe

1. The deduplication value of a certain column of dataframe

df[""].unique()

2. The number of deduplicated values ​​in a column of dataframe

len(df[""].unique())

Implementation code

import pandas as pd

data = pd.DataFrame({'name':['wencky','stany','barbio'],
                      'age':[29,29,3],
                      'gender':['w','m','m']})

print(data)
print('age去重',data["age"].unique(),sep='\n')
print('去重后数量',len(data["age"].unique()),sep='\n')

achieve effect

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