def METHOD_NAME():
    """
    >>> manager_from_expression()
    enter
    1
    exit <type 'NoneType'> <type 'NoneType'> <type 'NoneType'>
    enter
    2
    exit <type 'NoneType'> <type 'NoneType'> <type 'NoneType'>
    """
    with GetManager().get(1) as x:
        print(x)
    g = GetManager()
    with g.get(2) as x:
        print(x)