GridSearchCV with MLPRegressor with Scikit learn
It would be helpful to get the ouput of the program (or at least the error thrown)

However, MLPRegressor hidden_layer_sizes is a tuple, please change it to:

param_list = {"hidden_layer_sizes": [(1,),(50,)], "activation": ["identity", "logistic", "tanh", "relu"], "solver": ["lbfgs", "sgd", "adam"], "alpha": [0.00005,0.0005]}


https://scikit-learn.org/stable/modules/generated/sklearn.neural_network.MLPRegressor.html