Tags / unique
Filter Groups in Pandas DataFrames with Boolean Indexing and np.in1d
Improving Query Performance: The Benefits and Drawbacks of Unique Composite Indices
Assigning a Unique ID Column by Group in R: A Comparative Analysis of Base R, dplyr, and Tidyverse Packages
Identifying Unique Rows in Data Frames with Missing Values Using Various Methods
Identifying Data with Zero Value in Python Using Pandas Library