I am trying to write code in python and I am getting errors

#Split the data into 75% training and 25% testing

from sklearn.model_selection  import train_test_split 

X_train, X_test, Y_train, Y_test = train_test_split[X, Y, test_size = 0.25, random_state = 0]


  File "<ipython-input-60-faa0fcebe128>", line 2
    X_train, X_test, Y_train, Y_test = train_test_split[X, Y, test_size = 0.25, random_state = 0]
                                                                        ^
SyntaxError: invalid syntax

train_test_split is a function, functions need round brackets.