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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 init_backend(backend_cmd):
 """Init backend within the backend_cmd"""


    try:
        backend_cmd.backend
    except AttributeError:
        parsed_args = vars(backend_cmd.parsed_args)
        init_args = find_signature_parameters(backend_cmd.BACKEND,
                                              parsed_args)
        backend_cmd.backend = backend_cmd.BACKEND(**init_args)

    return backend_cmd