def sprout_branch(off_branch, branch):

    repo_check()

    return repo.git.execute([git, 'checkout', off_branch, '-b', branch])
uBoostBDT is AdaBoostClassifier, which is modified to have flat
dataset/ETHPy150Open kennethreitz/legit/legit/scm.py/sprout_branch--crossover with--dataset/ETHPy150Open anaderi/lhcb_trigger_ml/hep_ml/uboost.py/uBoostBDT.__init__