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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create_deploy_branch(deploy_branch, push=True):
 """ If there is no remote branch with name specified in ``deploy_branch``, create one. Note that default ``deploy_branch`` is ``gh-pages`` for regular repos and ``master`` for ``github.io`` repos. Return True if ``deploy_branch`` was created, False if not. """

    if not deploy_branch_exists(deploy_branch):
        print("Creating {} branch on doctr_remote".format(deploy_branch))
        clear_working_branch()
        run(['git', 'checkout', '--orphan', DOCTR_WORKING_BRANCH])
        # delete everything in the new ref.  this is non-destructive to existing
        # refs/branches, etc...
        run(['git', 'rm', '-rf', '.'])
        print("Adding .nojekyll file to working branch")
        run(['touch', '.nojekyll'])
        run(['git', 'add', '.nojekyll'])
        run(['git', 'commit', '-m', 'Create new {} branch with .nojekyll'.format(deploy_branch)])
        if push:
            print("Pushing working branch to remote {} branch".format(deploy_branch))
            run(['git', 'push', '-u', 'doctr_remote', '{}:{}'.format(DOCTR_WORKING_BRANCH, deploy_branch)])
        # return to master branch and clear the working branch
        run(['git', 'checkout', 'master'])
        run(['git', 'branch', '-D', DOCTR_WORKING_BRANCH])
        # fetch the remote so that doctr_remote/{deploy_branch} is resolved
        run(['git', 'fetch', 'doctr_remote'])

        return True
    return False