How can I calculate or monitor the training of a neural network in pybrain?

I have a neural network n pybrain,with two inputs,a hidden layer and a output layer.I use the following to train:

trainer = BackpropTrainer(net,ds)
trainer.trainUntilConvergence()

net is the neural network and ds is the train data.

My question is if and how I can calculate the time needed to complete the training or how can I monitor the progress of the training.Thanks.