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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 _load_w2v(model_file=_f_model, binary=True):
    '''
    load word2vec model
    '''
    if not os.path.exists(model_file):
        print("os.path : ", os.path)
        raise Exception("Model file [%s] does not exist." % model_file)
    return KeyedVectors.load_word2vec_format(
        model_file, binary=binary, unicode_errors='ignore')