Best practice to fill one column with manipulated values from another (DataFrame)?

chrisxfire not sure if this is what you were looking for, but you might be able to use the Apply function to take the values from one column, manipulate them, and save them to another column. Here's an example of that:

Alternatively, using the same data as above, you could also do the following which produces the same result:

I believe that the `Apply` method is implemented on PrimitiveDataFrameColumn, but not DataFrameColumn which is why you can't call it directly from `df["Numbers"]`