note: doing anything on a 250gb file in python will require a lot more ram than 250gb. generally my expectation is I will need 10x the ram as the size of the fi

note: doing anything on a 250gb file in python will require a lot more ram than 250gb. generally my expectation is I will need 10x the ram as the size of the file when using pandas, for when I accidentally do something that triggers pathological behavior.