How to check every pandas series value is unique

Question

I know how to count the number of unique values in pandas series (one column in pandas dataframe).

pandas.Series.value_counts 

But how do I check if they are all unique? Should I just compare value_counts with its length?

Answer 1

IIUC, pd.Series.is_unique

pd.Series([1, 2, 3]).is_unique True 

And

pd.Series([1, 2, 2]).is_unique False