ratio is still a bit of a weird parameters. Here is a proposal for further development:

• remove the deprecation regardingfloat asratio which is a valid parameter withbinary target.
• 'all' in over-sampling should be changed to'not majority'. This is currently doing the same process but this is weird for the user.
• cleaning methods should have their ownratio type.str should be accepted butdict should be replaced by alist since we cannot select how many sample to select. Alsofloat would not be accepted for the exact same reason.

ratio should also be renamed. My proposalsampling_target?