Add print statements to RandomSearchCV and GridSearchCV

[avivfaraj]

Describe the workflow you want to enable

It is not a new algorithm, I was just frustrated running Grid and Random SearchCV for hours without knowing when it ends. It should be easy to add a print statement to inform the user about the process. It could be a percentage (let's say 80% done), or just to inform which parameters have been used in each iteration, so the user knows it is working.

Describe your proposed solution

Either print parameters in each iteration
or
calculate how many iteration there are, and print the percentage done so far.

Describe alternatives you've considered, if relevant

No response

Additional context

No response

[jeertmans]

Hello @avivfaraj , have you tried to set the verbose flag to a nonzero value?
It might give you what your are looking for.

[glemaitre]

As mentioned by @jeertmans verbose provides some info already. However, we will not add more printing information and instead lean towards a logging mechanism. So this issue is kind of a duplicate of #17439