Modifying a Series in-place

In-place modification of a Series is a slightly controversial topic. When possible, it is preferred to perform operations that return a new Series with the modifications represented in the new Series. But, if needed, it is possible to change values and add/remove rows in-place.

An additional row can be added in place to a series by assigning a value to an index label that does not already exist. The following code creates a Series object and adds an additional item to the series:

The value at a specific index label can be changed in place by assignment:

Rows can be removed from a Series by passing their index labels to the del() function. The following demonstrates removal of the row with the index label 'a':

Note

To add and remove items out of place, you use pd.concat() to add and remove using a Boolean selection.

An important thing to keep in mind when using slicing is that the result of the slice is a view into the original Series. Modification of values through...