Say you have created a commit in the wrong branch and you would like to reproduce that commit in the right branch, then you can cherry-pick that commit and apply it to your current branch.
If you want to apply the last commit of branch experiment to the current branch:
git cherry-pick experiment
If you want to apply commit 78c5f6 to the current branch:
git cherry-pick 78c5f6
In both cases you will have a new commit in your current branch with the changes from the commit you cherry picked.
If the commit cannot be applied cleanly, you will have to resolve a merge conflict. This article explains how to do that.
If you are using PyCharm then you can easily resolve merge conflicts using the VCS - Git - Resolve conflicts feature.