Exercise$1$: Change every column name of every DataFrame to lowercase and snake case. This is a standard first step for some programmers as lowercase makes it easier to write and snake case makes it easier to copy multiple$-$word column names.

For example, Castaway Id should end up being castaway$\_$id$.$ You should try doing this using a for loop instead of manually changing the names for each column. It should take you no more than a few lines of code. Use stackoverflow if you need help.

dataframes $=\{$

'castaway$\_$details': castaway$\_$details,

'castaways': castaways,

'challenge$\_$description': challenge$\_$description,

'challenge$\_$results': challenge$\_$results,

'confessionals': confessionals,

'hidden$\_$idols': hidden$\_$idols,

'jury$\_$votes': jury$\_$votes,

'tribe$\_$mapping': tribe$\_$mapping,

'viewers': viewers,

'vote$\_$history': vote$\_$history,

'season$\_$summary': season$\_$summary,

'season$\_$palettes': season$\_$palettes,

'tribe$\_$colours': tribe$\_$colours$\}$