Theano的借用参数是多少？

Question

I see this following line of code:

n_train_batches = train_set_x.get_value(borrow=True).shape[0] / batch_size

In the above line, what is the borrow parameter exactly? What is the advantage of adding that there? FYI, train_set_x is basically a matrix that was generated using the theano.shared method.

Answer 1

This part of the documentation seems relevant:

By default ( s_default ) and when explicitly setting borrow=False , the shared variable we construct gets a deep copy of np_array. So changes we subsequently make to np_array have no effect on our shared variable.

Setting it to True can then be assumed to make a shallow copy, effectively letting you "borrow" access to the memory.