def _infer_language(backend):
    langs = _lang_lookup.get(backend.upper(), False)
    if not langs:
        raise ValueError("Unrecognized backend: " + backend)
    return langs[0]
Find a maximum single-commodity flow.
dataset/ETHPy150Open sympy/sympy/sympy/utilities/autowrap.py/_infer_language--crossover with--dataset/ETHPy150Open networkx/networkx/networkx/algorithms/flow/maxflow.py/maximum_flow