unique categories in a column pandas code example

Example 1: pandas distinct

>gapminder['continent'].unique()
array(['Asia', 'Europe', 'Africa', 'Americas', 'Oceania'], dtype=object)

Example 2: pandas unique values to list

df.groupby('param')['column'].nunique().sort_values(ascending=False).unique().tolist()

Example 3: unique values in dataframe column

#List unique values in the df['name'] column
df.name.unique()