Python For Loops Returning Last Value | Explanation

Question

I have a simple problem which I\'ve solved but it would be great if someone could explain why for loops do this in python and if there is a more elegant way. Re

Answer 1

First way, append() doesn't return anything, so its return value will be None.

Second way, nothing is "being returned", you are overwriting the value within a loop, then only inspecting the value of the entire df["Month_Name"] column after the final iteration, which by definition, will be the last value.

I think using loops is the wrong approach here, you should be using apply or map functions instead, but if you wanted a loop, I might suggest this

df["Month_Name"] = [calendar.month_abbr[i] for i in df["Month_Number"]]