StackRating
An Elo-based rating system for Stack Overflow
Answers and rating deltas for
object of type 'NoneType' has no len() when trying to merge two dataframes on two columns
| Author | Votes | Δ |
|---|---|---|
| Niels Henkens | 0 | 0.00 |
Last visited: Feb 19, 2019, 8:26:47 AM