<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def nhanesi(display=False):
 """ A nicely packaged version of NHANES I data with surivival times as labels. """

    X = pd.read_csv(cache(github_data_url + "NHANESI_subset_X.csv"))
    y = pd.read_csv(cache(github_data_url + "NHANESI_subset_y.csv"))["y"]
    if display:
        X_display = X.copy()
        X_display["Sex"] = ["Male" if v == 1 else "Female" for v in X["Sex"]]
        return X_display, np.array(y)
    else:
        return X, np.array(y)