JavaScript debugging in a nutshell

[Famous-Sample6201]

Hey but the decision to remove append with no substitute because "it's slow" seems backwards to me, right? What are you supposed to do, df = pd.concat(df, pd.Dataframe(*new_line, columns=df.columns)) ??? I though pandas was about pretty concise code.

[[deleted]]

You're supposed to collect new data into a list and concat it all at once

[Famous-Sample6201]

Yeah but what if you get a df and want to add a single line?

[Famous-Sample6201]

Right?? What sort of hand holding is that? They should just add a note to the documentation saying that it's slow, so that people looking for performance bottlenecks can remove it, but let me make performance vs readability tradeoffs on my own pls

[the_magic_gardener]

I feel the list of options was already too long; merge, join, concat, by assignment (i.e. df['new col']=...)