how to count number of unique values in a two column list python code example

Example 1: how to count number of unique values in a column python

pd.value_counts(df.Account_Type)

Gold        3
Platinum    1
Name: Account_Type, dtype: int64

Example 2: python - count how many unique in a column

df['var_1'].nunique()   # How many unque values are present in a variable