Milo DuBois

`pandas.DataFrame.ix` is deprecated as of version `0.20.0`, and consequently the following code from https://jakevdp.github.io/PythonDataScienceHandbook/03.11-working-with-time-series.html generates error if alternative is not used (described in second code block). _incorrect (uses deprecated indexer):_...

Future versions of Pandas will not support `pd.Index` operations like this: ```py first | second ``` but must be used like this ```py first.union(second) ``` This is similar for `&`...