def standardise(data, output = True, method = "robust"):
    if method == "robust": from sklearn.preprocessing import RobustScaler as scaler
    elif method == "standard": from sklearn.preprocessing import StandardScaler as scaler
    elif "min" in method or "max" in method: from sklearn.preprocessing import MinMaxScaler as scaler
    elif "abs" in method: from sklearn.preprocessing import MaxAbsScaler as scaler