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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 install(runas=None, path=None):
    '''
    Install pyenv systemwide

    CLI Example:

    .. code-block:: bash

        salt '*' pyenv.install
    '''
    path = path or _pyenv_path(runas)
    path = os.path.expanduser(path)
    return _install_pyenv(path, runas)