How to change the parameters in the second attempt?

[lixiaolong41]

For example, if the first attempt is unsuccessful, change the parameter proxy and try again

[inyutin]

@lixiaolong41 hello. You can do it now, with version >= 2,8,0
See an example in readme

[denisolyanyuk]

Not very convenient: for example I don't know which proxies would be available at the time of retry.
I think some callback like before_retry would be more flexible