setattr

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setattr(config, key, val)
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def __setitem__(self, key, value):
    if key == "nepochs":
        Config.nepochs = value
    elif key == "dim_char":
        Config.dim_char = value
    elif key == "batch_size":
        Config.batch_size = value
    elif key == "lr_method":
        Config.lr_method = value
    elif key == "lr":
        Config.lr = value
    else:
        raise ValueError("not exist this attr")
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