python-pandasHow to get unique values from data frame column

Usage example

import pandas as pd

df = pd.DataFrame({
  'type': ['A', 'A', 'A', 'B', 'B', 'C'],
  'age': [1, 3, 6, 3, 4, 1]
})

print(df.type.unique())
print(df.age.unique())

output

0    A
1    A
2    A
3    B
4    B
5    C
Name: type, dtype: object
['A' 'B' 'C']
[1 3 6 4]